Application of EDI-OCT in measuring the plate thickness in patients with branch retinal vein occlusion / 眼科新进展

Objective To analyze the application value of enhanced depth imaging optical coherence tomography (EDI-OCT) in measuring the lamina cribrosa thickness(LCT) in patients with branch retinal vein occlusion (BRVO).Methods The clinical data of 65 patients with unilateral BRVO treated in our hospital from September 2014 to March 2016 were selected as the observation group.The single healthy eyes of 40 healthy individuals who received physical examination in the hospital during the same period were selected as the control group.The changes of retinal nerve fiber layer (RNFL) thickness,LCT,central corneal thickness,axial length,transverse diameter of optic disc,vertical diameter of optic disc,diopter and extent of visual field defect in the two groups were determined by EDI-OCT.Results There was no significant difference in the central corneal thickness,axial length,transverse diameter of optic disc,vertical diameter of optic disc and diopter between the two groups (all P ＞ 0.05).LCT of different regions of optic disc in the observation group were lower than those in the control group (all P ＜ 0.05).The range of visual field defects in the observation group was larger than that in the control group,and the RNFL thickness was lower than that in the control group (P ＜ 0.05).LCT was positively correlated with the thickness of whole RNFL in patients with BRVO,and was negatively correlated with the visual field defects (P ＜ 0.05).Conclusion EDI-OCT is an effective means for measuring LCT.LCT of patients with glaucoma BRVO is thinner than that of normal healthy people,and LCT is positively correlated with RNFL.thickness,and negatively correlated with visual field defects.

Lamina Cribrosa Thickness in the Fellow Eyes of Patients with Unilateral Retinal Vein Occlusion

PURPOSE: To compare the lamina cribrosa thickness in fellow eyes of patients with unilateral retinal vein occlusion (RVO) with the normal control eyes and the type of RVO. METHODS: This study included 40 patients with unilateral RVO and 45 normal control subjects. We compared the lamina cribrosa thickness between the RVO eyes and the fellow eyes, the fellow eyes and the normal control eyes and the type of RVO eyes. We measured central lamina thickness using enhanced depth imaging spectral-domain optical coherence tomography. RESULTS: In patients with unilateral RVO, central lamina cribrosa thickness was not significantly different between the RVO eyes (211.33 microm) and the fellow eyes (204.13 microm; p = 0.202). However, central lamina cribrosa thickness in the fellow eyes was significantly reduced compared with the normal control eyes (217.76 microm; p = 0.046). Central lamina cribrosa thickness in the fellow eyes according to the type of RVO was not statistically significantly different (p = 0.672). CONCLUSIONS: This study showed that the central lamina cribrosa thickness in the fellow eyes of patients with unilateral RVO was thinner than in normal patients. Therefore, the lamina cribrosa thickness may be associated with RVO as well as glaucoma.

Relationship between the Lamina Cribrosa, Outer Retina, and Choroidal Thickness as Assessed Using Spectral Domain Optical Coherence Tomography

PURPOSE: To evaluate the characteristics and relationship between peripapillary choroidal thickness (pCT), lamina cribrosa thickness (LCT), and peripapillary outer retinal layer thickness (pORT) as determined using spectral domain optical coherence tomography (SD-OCT) enhanced depth imaging (EDI). METHODS: In total, 255 participants were included (87 healthy subjects, 87 glaucoma suspects (GS), and 81 glaucoma cases). The pORT, defined as the thickness between the posterior outer plexiform layer and the retinal pigment epithelium (RPE) interface, and the pCT, between the outer margin of the RPE and the choroidal-scleral interface, were manually measured using EDI scanning of the circumpapillary retinal nerve fiber layer (RNFL). LCT was determined by EDI scanning of the optic nerve head (ONH). Baseline characteristics, including axial length (AXL) and the SD-OCT measurements of the participants, were compared among the three groups. The correlation between putative factors and pCT was determined using univariate and multivariate linear regression analyses. RESULTS: In all three groups, both pORT and pCT were thinnest in the inferior area among the four quadrants. In the healthy group, the mean peripapillary RNFL, pORT, and LCT were significantly greater in comparison with those of the GS and glaucoma groups (p < 0.001, p < 0.038, and p < 0.001, respectively). The pCT demonstrated no significant differences among the three groups (p = 0.083). Only age and AXL were associated with pCT by multivariate analysis. CONCLUSIONS: The pCT is substantially thinner in the inferior area of the ONH. In addition, the pCT demonstrates the strongest correlation with age and AXL, but was not associated with glaucoma or LCT.

Age-Related Changes in the Thickness of the Lamina Cribrosa Measured by Spectral Domain OCT

PURPOSE: To measure the lamina cribrosa thickness (LCT) in vivo of healthy people and to determine any association between the LCT and age or sex. METHODS: We evaluated 100 eyes of 100 healthy volunteers. Forty eyes were selected and divided into 2 specific age groups (38-49 and 78-89 years) and the differences were assessed with respect to age and sex. Each participant underwent a complete eye examination and the LCT was evaluated with spectral domain optical coherence tomography (OCT) using enhanced depth imaging (EDI) mode. RESULTS: Eighty-seven eyes were considered for the measurement and analysis of the LCT and 13 eyes were excluded because of an unclear image for identifying the LCT. The mean age was 55.0 +/- 19.5 years. The mean LCT in healthy volunteers was 231.3 +/- 41.6 microm (range, 152.5 - 327.5 microm) and a negative relationship was found between LCT and age (LCT = -1.614 x age + 320.191 microm, 95% CI for slope -1.91 to -1.32, r2 = 0.572, p < 0.001). Regarding differences related to sex, males had relatively thicker LCT than females, irrespective of age, although not statistically significant (p = 0.623). CONCLUSIONS: The present study results showed a decrease in human LCT with increasing age. Therefore, a decreasing LCT with an increasing age could be considered a strong risk factor for the development of glaucoma. In addition, measuring the LCT may help to understand the disease prognosis.