Optical Coherence Tomography Measurement and Visual Outcome in Acute Central Retinal Artery Occlusion

PURPOSE: This study investigated visual acuity (VA) values and differences depending on optical coherence tomography (OCT) findings in patients with acute central retinal artery occlusion (CRAO). METHODS: A retrospective chart review was performed on patients with acute CRAO who underwent macular and disc OCT. We evaluated changes in macular thickness and retinal nerve fiber layer (RNFL) thickness after acute CRAO onset based on OCT. We also determined the association of thickness changes with VA improvement. RESULTS: This study involved both eyes in a total of 12 patients with acute CRAO. A significant increase was observed in foveal (1 mm) thickness (p = 0.002), parafoveal (3 mm) thickness (p = 0.002), and peripapillary RNFL thickness (p = 0.005) in affected eyes with CRAO, but not in central foveal thickness (p = 0.266). A significant small difference in both eyes (affected eye – fellow eye) was shown in foveal (1 mm) and mean parafoveal (3 mm) thickness in the improved VA group (p = 0.008 and p = 0.004, respectively), but not in central foveal or peripapillary RNFL thickness (both p = 0.283). CONCLUSIONS: Both macular and RNFL thickness increased in patients with acute CRAO. RNFL thickness decreased over time with progression of RNFL atrophy. Less macular damage caused by acute CRAO could be predicted by a small difference in macular thickness between eyes (affected eye – fellow eye). In such cases, patients had a greater chance of VA improvement.

Differences among Ophthalmology Patients Referred to Tertiary Medical Centers according to Referral Hospital

PURPOSE: This study aimed to investigate the diagnosis and severity of patients who were referred to tertiary medical centers according to the type and function of the referral hospitals. METHODS: First-visit patients referred from July 2015 to June 2016 were retrospectively reviewed with regard to referral hospital, final diagnosis, treatment necessity, and medical fees for the six months after their first hospital visit. Based on these data, differences in type and function of medical institution were examined. RESULTS: In a comparison of hospitals according to their number of beds, clinics, hospitals and, tertiary hospitals had no differences in the ratio of patients who needed treatment (p = 0.075) and their medical fees over six months (p = 0.372). When hospitals were classified by functional capability in terms of doctors' medical specialty, increasing ratios of patients requiring medical treatment (p < 0.001) and medical fees for six months (p < 0.001) were found in the order of non-eye specialists, eye specialists, and eye specialists in trainee hospital. CONCLUSIONS: Efficient healthcare delivery systems should classify medical institutions by functionality capability based on medical specialties rather than hospital size according to the number of beds.