Evaluation of ganglion cell complex and retinal nerve fiber layer thinning in epilepsy patients

Purpose: This study aimed to compare the perimacular ganglion cell complex (GCC) and peripapillary retinal nerve fiber layer (RNFL) thickness measurements of epileptic and healthy individuals. Methods: The right eyes of 38 epileptic and 38 healthy individuals who had been using antiepileptic drugs (AEDs) for at least 1 year were included in the study. Central macular thickness, perimacular GCC thickness and volume, and peripapillary retinal nerve fiber layers were measured by optical coherence tomography (OCT) device. Perimacular 1, 3, and 6 mm circle diameters of Early Treatment of Diabetic Retinopathy Study (ETDRS) were selected for GCC measurements. Results: In epilepsy patients, GCC was significantly lower in the 3 mm superior quadrant and 6 mm in all quadrants compared to the control group (P < 0.05). RNFL was significantly thinner in epilepsy patients only in the temporal?inferior quadrant (P < 0.05). There was no significant difference between the patients who received AEDs as monotherapy and polytherapy (P > 0.05). Conclusion: We found that epilepsy patients had significant thinning in the GCC layers and temporal?inferior quadrant of RNFL compared to the control group. Our findings from the study show that early retinal changes in epilepsy patients, especially perimacular GCC layers, can be followed up with OCT.

A cross-sectional study analyzing the correlation between the mean retinal nerve fiber layer and ganglion cell layer thickness with axial length and refractive errors among children aged 5–15 years

Purpose: To analyze the correlation between the mean retinal nerve fiber layer (RNFL) and ganglion cell layer (GCL) thickness with axial length and refractive errors among children aged 5–15 years. Methods: This cross?sectional, observational study was done on 130 eyes of 65 consecutive subjects with refractive errors. The patients were evaluated for RNFL thickness and macular GCL thickness using spectral domain? optical coherence tomography. Results: One hundred and thirty eyes of 65 subjects aged between 5 and 15 years were divided into three groups based on their spherical equivalent in diopters (D). The children with a spherical equivalent of ??0.50 D were considered myopic, ??0.5 to ?+0.5 D were considered emmetropic, and ?+0.50 D were considered hypermetropic. RNFL thickness and GCL thickness were correlated with age, gender, spherical equivalent, and axial length. The mean global RNFL thickness was 104.58 ?m ± 7.567. Conclusion: There exists a negative correlation between RNFL thickness and macular GCL thickness with increasing severity of myopia and increase in axial length, and the possible reason could be stretching of the sclera, which further leads to stretching of the retina, resulting in thinner RNFL and macular GCL thickness

Papillomacular bundle sparing versus conventional internal limiting membrane peeling for idiopathic macular hole ?400 µm

Purpose: To compare the outcomes of papillomacular bundle (PMB) sparing internal limiting membrane (ILM) peeling (group LP) and conventional ILM peeling (group CP) for treatment of idiopathic macular hole (MH) of ?400 ?m. Methods: Fifteen eyes were included in each group. In group CP, conventional 360° peeling was done, while in group LP, ILM was spared over PMB. The changes in peripapillary retinal nerve fiber layer (pRNFL) thickness and ganglion cell?inner plexiform layer (GC?IPL) thickness were analyzed at 3 months. Results: MH was closed in all with comparable visual improvement. Postoperatively, retinal nerve fiber layer (RNFL) was significantly thinner in the temporal quadrant in group CP. GC?IPL was significantly thinner in the temporal quadrants in group LP, whereas it was comparable in group CP. Conclusion: PMB sparing ILM peeling is comparable to conventional ILM peeling in terms of closure rate and visual gain, with the advantage of less retinal damage at 3 months.

Study of retinal nerve fiber layer thickness in diabetic patients using optical coherence tomography

Purpose: This study aimed to assess and compare the changes in peripapillary retinal nerve fiber layer (RNFL) thickness in nondiabetics and diabetics with various stages of diabetic retinopathy (DR). Methods: The study subjects were divided into four groups based on their diabetic status and findings, namely, controls (normal subjects without diabetes [NDM]), diabetics without retinopathy (NDR), nonproliferative DR (NPDR), and proliferative DR (PDR). Peripapillary RNFL thickness was assessed using optical coherence tomography. One?way analysis of variance (ANOVA) with the post?Tukey HSD test was done to compare RNFL thickness in different groups. The Pearson coefficient was used to determine the correlation. Results: There was statistically significant difference in measured average RNFL (F = 14.8000, P < 0.05), superior RNFL (F = 11.7768, P < 0.05), inferior RNFL (F = 12.9639, P < 0.05), nasal RNFL (F = 12.2134, P < 0.05), and temporal RNFL (F = 4.2668, P < 0.05) across the different study groups. Pairwise comparison showed that there was a statistically significant difference in RNFL measured (average and all quadrants) in patients with DR (NPDR and PDR) and the NDM control group (P < 0.05). In diabetics without retinopathy, the RNFL measured was reduced compared to controls, but it was statistically significant only in the superior quadrant (P < 0.05). Average RNFL and RNFL in all quadrants showed a small negative correlation with the severity of DR and it was statistically significant (P < 0.001). Conclusion: In our study, peripapillary RNFL thickness was reduced in diabetic retinopathy compared to normal controls and the thinning increased with the severity of DR. This was evident in the superior quadrant even before the fundus signs of DR set in

Retinal nerve fiber layer thinning found in amyotrophic lateral sclerosis – Correlation with disease duration and severity

Purpose: The retinal involvement of amyotrophic lateral sclerosis (ALS) is a novel idea about a possible correlation between retinal nerve fiber layer (RNFL) thickness in different spectra of ALS patients. Finding the association of RNFL with disease duration and severity will help identify a novel noninvasive biomarker. Methods: The study was designed as a cross?sectional study and was conducted with a suitable proforma. We included the ALS cases based on the revised El Escorial criteria. Healthy controls were age and gender matched. We used the revised ALS functional rating scale (ALSFRS?R) to assess the operational status of the patients. We measured RNFL thickness in the four quadrants with spectral?domain optical coherence tomography (OCT) and analyzed it. Results: We included 30 cases (60 eyes) and 10 healthy controls (20 eyes) having a mean (standard deviation [SD]) age of 49.5 (11.1) years with a median of 50 years, and a majority of them (65%) were middle aged (between 41 and 60 years). We found statistically significant differences in RNFL thicknesses between ALS patients and healthy controls. On segmental analysis, the right eye superior and nasal quadrants and the left eye superior, inferior, and nasal quadrants were significantly affected, along with a gross asymmetry found between the left and right eyes among ALS patients. There was a significant decrease in average RNFL thickness in definite ALS patients than probable ALS patients, with significantly reduced average RNFL thickness in moderate to severe ALS patients. On correlation analysis, disease duration showed a good negative correlation with bilateral average RNFL thickness, and the ALSFRS?R score demonstrated a good positive correlation with bilateral average RNFL thickness, which was statistically significant. Thus, a reduced bilateral RNFL thickness is associated with a decreased ALSFRS?R score. Conclusion: The retinal changes can serve as a marker for diagnosing and monitoring patients with ALS

Relationship between optical coherence tomography findings and clinical variables in patients with opiate use disorder / Relação entre os achados da tomografia de coerência óptica e as variáveis clínicas em pacientes com transtorno por uso de opiáceos

ABSTRACT Purpose: This study aimed to examine optical coherence tomography findings in patients with opiate use disorder by comparing them with healthy controls. Methods: The study included 30 opiate use disorder patients and 30 controls. The participants' detailed biomicroscopic examinations, visual acuity, intraocular pressure, and both eye examinations were evaluated. A total of 120 eyes were evaluated using optical coherence tomography, measuring the central macular thickness, mean macular thickness, mean macular volume and retinal nerve fiber layer thickness. Moreover, all participants filled in the demographic data form and Barratt Impulsiveness Scale. Results: Upon examination of the optical coherence tomography findings, central macular thickness, mean macular thickness, and mean macular volume were thinner in both eyes in patients with opiate use disorder (p<0.01 in all measurements in both eyes). Similarly, the total values of the superior quadrant and retinal nerve fiber layer thickness were statistically significant in both eyes compared to that in the control group (p=0.007, p=0.002; p=0.049, p=0.007, in the right and left eyes, respectively). Only the left eye was positively correlated with retinal nerve fiber layer superior quadrant measurement and hospitalization (r=0.380, p=0.039). Conclusion: Our results revealed that the patients' central macular thickness, mean macular thickness, and mean macular volume values were thinner. Increase in the retinal nerve fiber layer thickness superior quadrant thickness and total value was also observed. Further studies with larger sampling groups that evaluate neuroimaging findings should be conducted.

RESUMO Objetivo: O objetivo foi investigar foi, os achados da tomografia de coerência óptica em pacientes com transtorno do uso de opiáceos, comparando-os com controles saudáveis. Métodos: O estudo incluiu 30 pacientes com transtorno do uso de opiáceos e 30 controles. Os exames biomicroscópicos detalhados de todos os participantes, acuidade visual, pressão intraocular e ambos os exames oculares foram avaliados com tomografia de coerência óptica. Um total de 120 olhos foram avaliados usando tomografia de coerência óptica, e a espessura macular central, espessura macular média, volume macular médio e a espessura da camada de fibra nervosa da retina dos participantes foram medidos. Além disso, todos os participantes preencheram o Formulário de Dados Demográficos e a Escala de Impulsividade Barratt (BIS-11). Resultados: Quando os achados de tomografia de coerência óptica foram examinados, espessura macular central, espessura macular média e volume macular médio eram mais finos de acordo com controles saudáveis em ambos os olhos em pacientes com transtorno do uso de opiáceos (p<0,01 em todas as medições em ambos os olhos). Da mesma forma, os valores totais do quadrante superior e espessura da camada de fibra nervosa da retina estavam mais em níveis estatisticamente significativos em ambos os olhos em comparação com o grupo controle (p=0,007, p=0,002; p=0,049, p=0,007, no olho direito e esquerdo, respectivamente). Estar internado em hospital e apenas a medida do quadrante superior da espessura da camada de fibra nervosa da retina do olho esquerdo associou-se positivamente (r=0,380, p=0,039). Conclusão: Em nossos resultados, descobrimos que os valores de espessura macular central, espessura macular média e volume macular médio dos pacientes eram mais finos. Verificamos também espessamento no quadrante superior e valor total da espessura da camada de fibra nervosa da retina. Nosso estudo deve ser apoiado por novos estudos com grupos de amostragem maiores, nos quais os achados de neuroimagem são avaliados.

Changes of ganglion cell complex and retinal nerve fiber layer thickness in different degrees of myopia / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To compare the changes in retinal nerve fiber layer(RNFL)and macular ganglion cell complex(GCC)measured by spectral domain optical coherence tomography(SD-OCT)in non-glaucoma subjects with low, moderate, and high myopia.METHODS: A total of 400 subjects(400 eyes)with myopia who attended our hospital from December 2019 to November 2022 were selected to participate in this study, and the subjects were divided into the following groups according to their degree of myopia: low myopia group(142 cases, 142 eyes, 35.5%), moderate myopia group(139 cases, 139 eyes, 34.8%)and high myopia group(119 cases, 119 eyes, 29.8%). RNFL thickness profiles were measured, including mean, superior, inferior, nasal, and temporal RNFL thickness. GCC parameters were measured, including mean, superior, superior temporal, inferior, inferior temporal, superior nasal, and inferior nasal. Correlation between RNFL thickness measured by OCT, mean GCC parameters, and axial length was evaluated.RESULTS: The mean RNFL thickness above, below and nasal side was significantly higher in the low and moderate myopia groups and the temporal RNFL thickness was significantly lower than the high myopia group(all P&#x003C;0.05); the mean GCC thickness above, above temporal, below, below temporal, above nasal, below nasal and mean GCC thickness were significantly higher in the low and moderate myopia groups than in the high myopia group(all P&#x003C;0.05); In the moderate myopia group, the mean RNFL and GCC thickness were both negatively correlated with axial length(r=-0.387, -0.309, all P&#x003C;0.05). In the high myopia group, both RNFL and GCC thickness means were negatively correlated with eye axis length(r=-0.499, -0.503, all P&#x003C;0.01).CONCLUSION:RNFL and GCC thicknesses tend to be thinner in subjects with high myopia than in subjects with low and moderate myopia.

Alterations of macular ganglion cell layer thickness and optic disc parameters in patients with early diabetic retinopathy / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To compare the changes of optic disc parameters, peripapillary retinal nerve fibers layer(pRNFL)thickness and macular ganglion cell layer(mGCL)thickness among patients with early diabetes retinopathy and healthy controls by Cirrus HD-optical coherence tomography(OCT).METHODS: In this cross-sectional comparative study, 45 non-diabetic retinopathy(NDR), 52 mild nonproliferative diabetic retinopathy(NPDR), 55 moderate NPDR with type 2 diabetes mellitus(T2DM)and 64 age-matched healthy controls were included. The fasting blood glucose(FBG), duration of diabetes, glycosylated hemoglobin(HbA1c)and past history of the patients were collected in detail. Optic disc parameters(i.e., binocular RNFL thickness symmetry percentage, rim area, optic disc area, cup-to-disc ratio, cup volume), pRNFL thickness and mGCL thickness were measured by Cirrus HD-OCT. The comparison of different groups was performed by one-way analysis of variance.RESULTS: Compared with the control group, the binocular RNFL thickness symmetry percentage and rim area were significantly decreased, while the average C/D and vertical C/D were significantly increased in the NDR group, mild NPDR group and moderate NPDR group(all P&#x003C;0.05). Compared with the control group, the peripapillary RNFL thicknesses(superior, temporal, inferior, nasal)and macular GCL thickness(average, minimum, superior, supero-temporal, infero-temporal, inferior, supero-nasal, and infero-nasal)became thinner in the NDR group, mild NPDR group, and moderate NPDR group(all P&#x003C;0.05).CONCLUSION: Patients with early DR have significantly decreased binocular RNFL thickness asymmetry, rim area, pRNFL and mGCL thickness, while they have significantly increased cup-to-disc ratio when compared to healthy controls. The results support the statement that DM causes inner retinal neurodegenerative changes even in T2DM patients without overt microangiopathy.

Comparison of spectral-domain optical coherence tomography parameters between the eyes of anisometropic amblyopia children and normal eyes / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To compare the thickness of retina in macular area and retinal nerve fiber layer(RNFL)around optic disc between the eyes of monocular anisometropic amblyopia children and normal eyes.METHODS: A total of 62 children(124 eyes)with monocular anisometropic amblyopia who were treated in Chengdu Women's and Children's Central Hospital from January 2021 to October 2022 were selected as the experimental group, and 60 children(60 eyes; right eye)with normal vision who were treated in the same period were selected as the control group. Spectral-domain optical coherence tomography(SD-OCT)was used to detect the retinal thickness in macular region and the RNFL thickness around optic disc in the two groups, and comparative analysis was performed.RESULTS: The retinal thickness and perioptic RNFL thickness of amblyopic children in experimental group were thicker than those in control group, and most of them had significant differences(P&#x003C;0.05). The retinal thickness and perioptic RNFL thickness of contralateral non-amblyopic children in experimental group were thinner than those in control group, but there were no significant differences in most of them(P&#x003E;0.05).CONCLUSIONS: There are differences in the retinal thickness of the macula and perioptic RNFL in the amblyopic eye and the contralateral non-amblyopic eye of monocular anisometropic amblyopic children compared with normal eyes, and the contralateral non-amblyopic eye is not completely equal to the normal eye.

Changes of retinal nerve fiber layer thickness in patients with pseudoexfoliation glaucoma / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To compare the retinal nerve fiber layer(RNFL)thickness in Uyghur patients with pseudoexfoliation syndrome(PEX)or pseudoexfoliative glaucoma(PEXG)and to provide a theoretical basis for the early diagnosis of PEXG.METHODS: A retrospective case-control study was conducted. A total of 70 cases(70 eyes)of Uyghur PEX patients, 80 cases(80 eyes)of PEXG patients, and 60 cases(60 eyes)of age-related cataract patients who were admitted to our hospital from April 2018 to June 2020 were selected as the PEX group, PEXG group, and CON group, respectively. The PEXG group was further divided into mild-to-moderate stage(56 eyes)and severe stage(24 eyes)based on the stage of visual field defect, and the RNFL thickness at different locations of the optic disc was analyzed.RESULTS: The mean defect(MD)gradually increased in the CON group, PEX group, and PEXG group, and it was significantly higher in PEXG group than that in the PEX group(P&#x003C;0.01). The RNFL thickness at different locations of the optic disc in the PEX group, mild-to-moderate stage PEXG group, and severe-stage PEXG group was thinner than that in the CON group(all P&#x003C;0.01). The mean RNFL thickness, as well as the RNFL thickness below and above the optic disc, were lower in the PEX group than in the CON group(all P&#x003C;0.01). The RNFL thickness at all locations of the optic disc in the severe-stage PEXG group was significantly lower than that in the mild-to-moderate stage PEXG group(all P&#x003C;0.01).CONCLUSION: The RNFL thickness in Uyghur patients with PEX begins to be thinner than those without pseudoexfoliation syndrome, and early detection of RNFL thickness in PEX patients is helpful for the diagnosis and early treatment of PEXG.

Research progress of optical coherence tomography angiography in detecting retinal and choroidal thickness and blood flow in patients with high myopia / 国际眼科杂志(Guoji Yanke Zazhi)

High myopia is a state of refractive error with myopia over -6.00D. High myopia is typically accompanied by multiple fundus lesions, thus making patients with high myopia suffer from varying degrees of impairment in visual function. As an emerging auxiliary way in ophthalmology, optical coherence tomography angiography(OCTA)can efficiently and non-invasively obtain microvascular stratified images of the retina and choroid and quantitatively analyze blood flow signals. Since the advent of OCTA, there have been numerous studies observing fundus changes in those with high myopia through OCTA. In this paper, some studies in which OCTA is applied to obtain retinal and choroidal thickness from patients with high myopia are reviewed, with a view to revealing the correlation between high myopia and the parameters such as retinal thickness, choroidal thickness, vessel density and the area of the foveal avascular zone and providing novel ideas to deeply investigate the mechanism of high myopia and delay the occurrence and development of high myopia.

Acupuncture for glaucoma-induced optic atrophy: a randomized controlled trial / 中国针灸

OBJECTIVE@#To observe the clinical effect of acupuncture for glaucoma-induced optic atrophy.@*METHODS@#A total of 70 patients (89 affected eyes) with glaucoma-induced optic atrophy were randomized into an observation group and a control group, 35 cases in each group. The control group was given basic western medicine treatment. In the observation group, on the basis of the treatment in the control group, acupuncture was applied at main acupoints i.e. Baihui (GV 20), Shangjingming (Extra), Chengqi (ST 1), Fengchi (GB 20), Zusanli (ST 36), combined with supplementary acupoints based on syndrome differentiation, once every three days, twice a week. The treatment for 3 months was required in both groups. Before treatment, after treatment and in follow-up of 6 months after treatment, the best corrected visual acuity (BCVA), intraocular pressure (IOP), indexes of visual field (visual field index [VFI], mean deviation [MD], pattern standard deviation [PSD]) and mean thickness of retinal nerve fiber layer (RNFL) were observed in the two groups.@*RESULTS@#Compared before treatment, BCVA was decreased after treatment and in follow-up in the control group (P<0.05); in the follow-up, BCVA in the observation group was higher than that in the control group (P<0.05). On each time point before and after treatment, there was no significant difference within or between the two groups (P>0.05). After treatment and in the follow-up, the mean thickness of RNFL was larger than the control group (P<0.05).@*CONCLUSION@#On the basis of the basic western medicine treatment, acupuncture can delay the decline of vision and the thinning of retinal nerve fiber layer in patients with glaucoma-induced optic atrophy.

Correlation analysis of retinal nerve fiber layer and macular retinal thickness in children with anisometropic amblyopia / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the changes and correlation of retinal nerve fiber layer(RNFL)and macular retinal thickness in children with anisometropic amblyopia.METHODS: A total of 159 cases(159 eyes)children with anisometropic amblyopia treated in our ophthalmology department from October 2020 to June 2021 were selected as the study group, and 159 cases(159 eyes)children with normal vision who examined in the ophthalmology department of our hospital in the same period and age group were selected as the control group. The study group received traditional comprehensive training combined with 4D visual training for amblyopia based on refractive correction and covering of healthy eyes. The RNFL and macular retinal thickness before and after treatment between the study group and the control group was compared, and the correlation between RNFL and macular retinal thickness before treatment in the study group was analyzed.RESULTS: The RNFL thickness of average, upper, lower, nasal and temporal in the study group before and after 3mo of treatment was higher than those of the control group, and the RNFL thickness of average, upper, lower, nasal and temporal before treatment in the study group was higher than those after 3mo of treatment(P&#x0026;#x003C;0.05). The average, inferior, nasal, temporal, nasal, and central retinal thickness of the outer ring of the macular area in the study group before treatment were higher than those in the same group after 3mo of treatment and the control group(P&#x0026;#x003C;0.05). Before treatment, there was a negative correlation between the thickness of the upper RNFL in the study group and the retinal thickness in the central macular area(r=-0.330, P&#x0026;#x003C;0.05), the thickness of the lower and nasal RNFL was positively correlated with the thickness of the temporal retina in the outer and inner rings of the macular area(all P&#x0026;#x003C;0.05), while the thickness of temporal RNFL was negatively correlated with the thickness of the nasal and temporal retina outside the macular area(r=-0.414, -0.462, all P&#x0026;#x003C;0.05).CONCLUSION: The changes in RNFL and macular retinal thickness in children with anisometropic amblyopia can hinder normal retinal development, and there is a certain correlation between RNFL and macular retinal thickness.

Changes in retinal nerve fiber layer and macular retinal thickness and predictive value of outcome in children with abnormal refractive amblyopia / 国际眼科杂志(Guoji Yanke Zazhi)

AIM: To investigate the changes in retinal nerve fiber layer(RNFL)and macular retinal thickness(MRT)in children with refractive abnormalities and amblyopia, and their predictive value of outcome.METHODS: A total of 168 children with myopic refractive abnormalities and monocular amblyopia admitted to our hospital from January 2020 to October 2022 were selected as the observation group, with 118 cases of mild to moderate amblyopia and 50 cases of severe amblyopia, and 168 children with normal vision were included as the control group in a 1:1 ratio during the same period. The changes of RNFL and MRT in two groups of children were statistically counted, and the correlation between the severity of refractive abnormalities and RNFL and MRT in children with amblyopia was analyzed. Additionally, the observation group was divided into effective subgroup and ineffective subgroup based on the therapeutic effect. The general information, as well as RNFL and MRT of the effective subgroup and the ineffective subgroups before and after treatment were compared. Logistic was used to analyze the factors influencing efficacy, and ROC curves was plotted to analyze the predictive value of RNFL and MRT alone or in combination for efficacy.RESULTS: RNFL and MRT of cases of severe amblyopia were higher than those of the mild to moderate amblyopia and the control groups(all P&#x0026;#x003C;0.05); the severity of amblyopia in children with refractive abnormalities is positively correlated with RNFL and MRT(rs=0.745 and0.724, both P&#x0026;#x003C;0.001); among patients of mild to moderate and severe, there were statistically significant differences between the effective and ineffective subgroups in terms of initial treatment age, fixation form, treatment compliance, as well as RNFL, MRT, and their differences before and 1mo postoperatively(all P&#x0026;#x003C;0.05). Logistic analysis showed that initial treatment age, fixation nature, treatment compliance, RNFL and MRT before and 1mo postoperatively were all factors influencing the therapeutic effect of amblyopia with refractive abnormalities in children(all P&#x0026;#x003C;0.05); after 1mo of treatment, the combined prediction of RNFL and MRT was significantly better than that of single prediction in children with mild to severe amblyopia.CONCLUSION:There are differences in RNFL and MRT in children with abnormal refractive amblyopia, and they are closely related to the different degrees and curative effects of children. The combination of RNFL and MRT after 1mo of treatment has certain value in predicting children with different degrees of abnormal refractive amblyopia.

Analysis of retinal sublayer thickness in Leber hereditary optic neuropathy and G11778A mutation carriers / 中华眼底病杂志

Objective:To analyze the thickness of peripapillary retinal nerve fiber layer (pRNFL) and photoreceptor (PR) sublayer in Leber hereditary optic neuropathy (LHON) and G11778A mutation carriers. Methods:A cross sectional study. From September 2020 to October 2021, 68 LHON patients (136 eyes) (patient group) and 40 G11778A mutation carriers (80 eyes) of LHON patients' families (carrier group) were included in the study. All patients were found to have G11778A mutation by Genetic testing. Forty healthy volunteers with 80 eyes matched to the age and gender of the patient group were recruited as a normal control group. All eyes were examined by optical coherence tomography (OCT). The pRNFL thickness was automatically measured by the built-in software of the OCT device. The total retinal thickness (MT) and the thickness of the outer bundle layer (OPL), outer nuclear layer (ONL), external limiting membrane to retinal pigment epithelium (ELM-RPE) in macular OCT images were measured by Image J software. Linear mixed model was used to analyze and compare the thickness of pRNFL, macular fovea and four layers above the nasal and temporal paracentral retina in patients, carriers and normal controls. The correlation between pRNFL and macular retinal sublayer thickness and the course of disease was also analyzed. Results:The thickness of the upper and lower pRNFL, temporal pRNFL and average pRNFL of the patients were smaller than those of the carriers and the normal control group ( P<0.01), and the nasal pRNFL thickness of the patients was smaller than that of the carriers ( P<0.01). Fovea: compared with the normal control group, the thickness of MT and ONT in the patient group was decreased, ONL thickness decreased in carrier group, with the significant different ( P<0.05). Parafovea: compared with normal control group, the thickness of MT and temporal ONL decreased and temporal OPL increased in the patients group, with the significant different ( P<0.05). In the carrier group, the thickness of MT and temporal, nasal ONL decreased, and the thickness of nasal OPL increased, with the significant different ( P<0.05). Compared with the carrier group, the MT thickness of the patient group was decreased, and the nasal ONL and nasal ELM-RPE thickness were increased, with the significant different ( P<0.05). Correlation analysis results showed that the thinning of pRNFL in the superior, nasal, temporal and average ( r=-0.22, -0.21, -0.25, -0.22), and the thickening of ELM-RPE in foveo-temporal ( r=0.19) were correlated with the course of disease ( P<0.05). Conclusions:The pRNFL of LHON patients with G11778A mutation becomes thinner and is related to the course of the disease. There were significant differences in the thickness of MT and PR sublayers between patients and carriers compared to the normal control group.

Assessment of changes in optic disc parameters and peripapillary retinal nerve fiber layer thickness in myopic patients and its correlation with axial length and degree of myopia

Purpose: The present study aimed to assess the changes in optic disc and peripapillary retinal nerve fiber layer (RNFL) parameters in myopic patients and its correlation with axial length (AL) and spherical equivalent (SE) using optical coherence tomography (OCT). Methods: This was a cross?sectional study carried out from August 2019 to September 2021 in the ophthalmology department of a tertiary care hospital in eastern India. Myopic patients in the age group of 20–40 years and SE between ? 0.5 to ? 10 Diopters (D) were included in the study. Patients were divided into two groups on the basis of degree of myopia and AL. Appropriate statistical analysis was done at the end of the study period. Results: The study included 307 eyes of 307 myopic patients. There were 181 females (58.96%) and 126 males (41.04%). The mean age of the patients enrolled for the study was 28.78 ± 5.76 years. Statistically significant difference (P < 0.001) was found between SE and AL in between the subgroups of A and B. With every 1 D increase in SE, the average peripapillary RNFL thickness decreased by 0.61 ? while with every 1 mm increase in AL, the average peripapillary RNFL thickness was found to reduce by 1.03 ?. Conclusion: Analysis of optic nerve head parameters and RNFL thickness by OCT for the diagnosis should be compared with a normative control group that has been matched for refractive error and AL instead of comparison with a normative database that has only been age matched.

Retinal nerve fiber layer and ganglion cell complex thickness analysis in patients having relative afferent pupillary defect

Purpose: To determine the retinal nerve fiber layer (RNFL) thickness and ganglion cell complex (GCC) thickness in patients having relative afferent pupillary defect (RAPD) measured by optical coherence tomography (OCT). Methods: This cross?sectional study was conducted on 30 patients with posterior segment disease and glaucoma presenting with RAPD. The control group comprised 30 patients with the aforementioned diseases without RAPD. RAPD was graded using neutral density filters placed over the unaffected eye. Peripapillary RNFL thickness and macular GCC were measured using the Cirrus HD?OCT machine. Results: There were 45 males and 15 females. There was a statistically significant (P < 0.05) difference in the mean of average RNFL thickness in patients having RAPD (64.73 ± 15.16 ?m in the affected eyes) as compared to sick control (82.73 ± 11.33 ?m in the affected eyes). It was further observed that there was a decrease in RNFL thickness with advancing grades of RAPD. There was a statistically significant (P < 0.05) difference in the mean of average GCC thickness in patients having RAPD (51.57 ± 14.96 ?m in the affected eyes) as compared to sick control (76.36 ± 8.06 ?m in the affected eyes). Conclusion: Our study suggests that there is a significant reduction in RNFL thickness and GCC thickness in RAPD patients as compared to the sick control group

A study of retinal changes in women with polycystic ovarian syndrome

Purpose: To compare the optical coherence tomography (OCT)?based retinal nerve fiber layer (RNFL) and ganglion cell layer (GCL) thickness at the posterior pole, and total macular thickness of women with the polycystic ovarian syndrome (PCOS) versus healthy reproductive age group females. Methods: The study included 110 eyes of 55 diagnosed cases of PCOS (study group) and 110 eyes of 55 healthy reproductive age group (15–49 years) females (control group). All patients underwent a detailed ophthalmological evaluation followed by an OCT to measure their retinal thicknesses. The body mass index (BMI) of patients was noted and compared with the retinal thickness. Also, the lipid profile and serum testosterone levels of PCOS patients were recorded. Results: The retinal thicknesses in the two study were similar and there was no statistically significant difference. However, on stratification with BMI, it was seen that in patients with BMI>30 kg/m2, the superior Retinal Nerve Fibre Layer (RNFL) was significantly thicker in the PCOS group as compared with the control group (P = 0.0006). The mean serum testosterone level in patients with PCOS was 141.3 ± 23.2. Also, 65.45% of patients had a serum testosterone level of more than 70 ng/dL. The mean HDL cholesterol in patients with PCOS was 38.1 ± 15.6. The mean LDL cholesterol in PCOS patients was 98.4 ± 21.7, and the mean total cholesterol in PCOS patients was 153.6 ± 27.3. Conclusion: Androgens have a trophic action on nerves, which could explain the increased RNFL thickness in these patients.

Comparison of radial peripapillary capillary density results of individuals with and without Helicobacter pylori infection / Comparação dos resultados da densidade capilar peripapilar radial de indivíduos com e sem infecção por Helicobacter pylori

ABSTRACT Purpose: To evaluate the radial peripapillary capillary density using optical coherence tomography angiography in patients with and without Helicobacter pylori infection. Methods: This prospective, cross-sectional study comprised 52 patients (52 eyes: Group 1) and 38 patients (38 eyes: Group 2) with and without H. pylori infections, respectively. The radial peripapillary capillary density and retinal nerve fiber layer thickness in 4 equal quadrants and 2 equal hemispheres in the peripapillary region were calculated using optical coherence tomography angiography. The optic nerve head parameters of the patients were also assessed. Results: The groups were similar in terms of age, gender, and the optic nerve head parameters. The radial peripapillary capillary densities in the superior hemisphere and quadrant were significantly lower in Group 1 than in Group 2 (p=0.039 and p=0.028, respectively) and were positively correlated with the superior hemisphere's retinal nerve fiber layer thickness (p<0.001 and p<0.001, respectively). Similarly, the radial peripapillary capillary densities in the inferior hemisphere and quadrant were also significantly lower in Group 1 compared to Group 2 (p=0.03 and p=0.017, respectively) and were positively correlated with the inferior hemisphere's retinal nerve fiber layer thickness (p<0.001 and p<0.001, respectively). The retinal nerve fiber layer thickness in the nasal and temporal quadrants were significantly decreased in Group 1 when compared to Group 2 (p=0.013 and p=0.022) and were positively correlated with the corresponding radial peripapillary capillary densities of the 2 quadrants (p=0.002 and p=0.022). Conclusion: The decreased radial peripapillary capillary density in the H. pylori-positive patients suggests that H. pylori may play a role in the etiopathogenesis of glaucoma.

RESUMO Objetivos: Avaliar a densidade capilar peripapilar radial de pacientes com e sem infecção por Helicobacter pylori (H. pylori) por meio de angiotomografia de coerência óptica. Métodos: Cinquenta e dois olhos de 52 pacientes com infecção por H. pylori (Grupo 1) e 38 olhos de 38 pacientes sem infecções por H. pylori (Grupo 2) foram incluídos neste estudo prospectivo e transversal. A densidade capilar peripapilar radial (%) e a espessura da camada de fibra nervosa retiniana (μm) em 4 setores iguais e 2 hemisférios iguais foram calculados automaticamente na região peripapilar por angiotomografia de coerência óptica. Os parâmetros da cabeça do nervo óptico dos pacientes também foram avaliados. Resultados: Os grupos foram semelhantes em relação aos parâmetros: idade, sexo e cabeça do nervo óptico. As densidades capilares peripapilares radiais no hemisfério superior, hemisfério inferior, quadrante superior e quadrante inferior foram significativamente menores no Grupo 1 do que no Grupo 2 (p=0,039, p=0,03, p=0,028 e p=0,017 respectivamente). As densidades capilares peripapilares radiais, tanto no hemisfério superior quanto no quadrante superior, foram correlacionadas positivamente com a espessura da camada de fibra nervosa da retina do hemisfério superior (p<0,001 e p<0,001). As densidades capilares peripapilares radiais no hemisfério inferior e no quadrante inferior foram positivamente correlacionadas com a espessura da camada do nervo retiniano do hemisfério inferior (p<0,001 e p<0,001). A espessura da camada da fibra nervosa retiniana nos quadrantes nasal e temporal diminuiu significativamente no Grupo 1 quando comparado ao Grupo 2 (p=0,013 e p=0,022), e esses valores foram positivamente correlacionados com as densidades capilares peripapilares radiais correspondentes nos quadrantes nasal e temporal (p=0,002 e p=0,022). Conclusão: A diminuição das densidades capilares peripapilares radiais nos olhos de indivíduos positivos para H. pylori sugere que H. pylori pode desempenhar um papel na etiopatogenia do glaucoma.

Assessment of retinal manifestations of Parkinson’s disease using spectral domain optical coherence tomography: A study in Indian eyes

Purpose: To assess the retinal manifestations of Parkinson’s disease using optical coherence tomography. Methods: A prospective case?control study comparing 30 eyes from 15 patients with Parkinson’s disease and 22 eyes from 11 healthy age?matched controls. Total macular subfield thickness and the thickness of the ganglion cell layer, nerve fiber layer, and peripapillary retinal nerve fiber layer were measured with spectral?domain optical coherence tomography (SD?OCT). Results: The mean age of PD patients was 68.4 years ± 10.64 (range: 46–82) and in the control group was 66.36 ± 5.22 (range: 64–68). The average disease duration in patients with PD was 6.7 ± 2.8 years (range: 2–10 years). The mean best?corrected visual acuity in PD was 20/26 and 20/20 in controls, with P = 0.0059, which was significant. Significant difference was also found in the contrast sensitivity between both groups. Structural differences in the central macular thickness (P = 0.0001), subfield thicknesses in the superior (P = 0.003), inferior (P = 0.001), nasal (P = 0.004), and temporal subfields (P = 0.017) was seen. Severe thinning of the ganglion cell layer was seen in PD patients (P = 0.000) as well as of the nerve fiber layer (P = 0.004). Peripapillary retinal nerve fiber thickness measured showed significant thinning in superotemporal (P = 0.000), superonasal (P = 0.04), inferonasal (P = 0.000), inferotemporal (P = 0.000), nasal (P = 0.000), and temporal quadrants (P = 0.000). Conclusion: Visual dysfunction was observed in patients with PD along with structural alterations on OCT, which included macular volumes, ganglion cell layer, and peripapillary retinal nerve fiber layer.