ABSTRACT
Purpose@#To analyze the relationship between corneal morphological factors and polysomnographic factors in patients with obstructive sleep apnea (OSA). @*Methods@#In all, 22 eyes of 22 patients with OSA were analyzed retrospectively under specular microscopy. The central corneal thickness (CCT), endothelial cell density (ECD), hexagonal cell percentage, and cell variation coefficient were measured using specular microscopy, and polysomnographic factors including the apnea-hypopnea index (AHI), respiratory disturbance index (RDI), oxygen desaturation index, and lowest O2 saturation were compared and analyzed between the OSA group and a control group consisting of 32 subjects. Additionally, we examined the statistical correlation between retinal nerve fiber layer (RNFL) thickness and the polysomnographic factors for the 12 OSA patients in which the RNFL thickness was measured. @*Results@#The mean CCT and mean ECD were significantly lower in the OSA group than in controls (p = 0.033, p = 0.021, respectively). As the severity of OSA worsened, a significant negative correlation developed, such that the CCT decreased as the AHI and RDI increased (r = -0.519, p = 0.013 and r = -0.542, p = 0.009, respectively); in addition, the ECD decreased as the RDI increased (r = -0.454, p = 0.034). As OSA progressed, the nasal RNFL thickness decreased with the lowest O2 saturation (r = 0.703, p = 0.011). @*Conclusions@#CCT and ECD were significantly lower in OSA patients than in controls and there was a significant correlation between corneal morphological factors and polysomnographic factors. Due to the possibility of hypoxia and various ophthalmic clinical diseases associated with OSA, close observation of ophthalmic abnormalities in OSA patients is required.
ABSTRACT
Purpose@#To analyze the relationship between corneal morphological factors and polysomnographic factors in patients with obstructive sleep apnea (OSA). @*Methods@#In all, 22 eyes of 22 patients with OSA were analyzed retrospectively under specular microscopy. The central corneal thickness (CCT), endothelial cell density (ECD), hexagonal cell percentage, and cell variation coefficient were measured using specular microscopy, and polysomnographic factors including the apnea-hypopnea index (AHI), respiratory disturbance index (RDI), oxygen desaturation index, and lowest O2 saturation were compared and analyzed between the OSA group and a control group consisting of 32 subjects. Additionally, we examined the statistical correlation between retinal nerve fiber layer (RNFL) thickness and the polysomnographic factors for the 12 OSA patients in which the RNFL thickness was measured. @*Results@#The mean CCT and mean ECD were significantly lower in the OSA group than in controls (p = 0.033, p = 0.021, respectively). As the severity of OSA worsened, a significant negative correlation developed, such that the CCT decreased as the AHI and RDI increased (r = -0.519, p = 0.013 and r = -0.542, p = 0.009, respectively); in addition, the ECD decreased as the RDI increased (r = -0.454, p = 0.034). As OSA progressed, the nasal RNFL thickness decreased with the lowest O2 saturation (r = 0.703, p = 0.011). @*Conclusions@#CCT and ECD were significantly lower in OSA patients than in controls and there was a significant correlation between corneal morphological factors and polysomnographic factors. Due to the possibility of hypoxia and various ophthalmic clinical diseases associated with OSA, close observation of ophthalmic abnormalities in OSA patients is required.
ABSTRACT
Purpose@#We report a case of xeroderma pigmentosum in a pediatric patient with a progressive pterygium-like lesion.Case summary: A 2-year-old girl with photophobia and localized, scattered, small, round brownish macules on skin areas exposed to the sun visited hospital. During follow-up, at the age of 7, she was diagnosed with xeroderma pigmentosum in Japan, and pigmented freckles on the upper and lower eyelids of both eyes were observed. At the age of 11, a possible medial limbal pingueculum and lower lid telangiectasis of the right eye were observed via slit-lamp examination, and one year later, a pterygium-like lesion and gradual fibrovascular tissue growth were found in the same location of the right eye. At the last visit, the progressive pterygium-like lesion and, lower lid telangiectasis of the right eye, and lid pigmentations of both eyes (xeroderma pigmentosum) were observed. The size of pterygium-like lesion continues to increase, but the patient remains under observation because the lesion was too small to remove. @*Conclusions@#We report the first case of xeroderma pigmentosum in a pediatric patient with a progressive pterygium-like lesion that showed age-related degeneration. We suggest that the pterygium-like lesion may reflect the photosensitivity to ultraviolet radiation characteristic of xeroderma pigmentosum.
ABSTRACT
Purpose@#To report two cases of early onset oculopharyngeal muscular dystrophy, which were suspected to be chronic progressive external ophthalmoplegia.Case summary: Case 1, a 15-year-old male and Case 2, a 13-year-old male brother, visited the clinic with persistent diplopia 6 years prior. The older brother’s best-corrected visual acuity was 0.6 in both eyes and showed an exodeviation of 25 prism diopters. Bilateral ptosis was observed with ocular muscle movement limitations in all directions, and bilateral macular edema was found on fundus examinations. The younger brother had a best-corrected visual acuity of 1.0 in both eyes and showed exodeviation of 45 prism diopters. Bilateral ptosis and ocular muscle movement limitations were also observed. Both patients were suspected to have chronic progressive external ophthalmoplegia and were referred to a neurologist for a neurological examination and muscle biopsy. The muscle biopsies showed that both patients were diagnosed with oculopharyngeal muscular dystrophy. @*Conclusions@#It is important, initially, to report a case of early onset oculopharyngeal muscular dystrophy that has eyelid and eye movement symptoms, but no other typical symptoms.