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This study aimed to evaluate the ability of a digital fundus camera to observe the development of the anterior chamber angle (ACA) in premature infants.Forty-eight eyes of preterm infants (n=48) were examined by a digital fundus camera to observe the development of the ACA. ACA grading was performed based on the visualization of the anterior chamber structures according to the Scheie Angle Depth Evaluating System.ACA images from all 48 infants were successfully acquired using RetCam3. The corrected gestational age ranged from 30 weeks to 49 weeks, which covered the period from 2 months preterm to2 months post-term. As the corrected gestational age increased, the corrected gestational age grading was significantly decreased. The mean corrected gestational ages of the infants corresponding to the ACA classification from grade IV to grade 0 were 32.75±1.89, 37.20±1.30, 39.75±2.38, 40.56±2.24, and 44.23±2.14 weeks, respectively, which were all significantly different (P0.05). The regression analysis showed a linear correlation between the grading of the ACA and the corrected gestational age (RThe ACA of a full-term newborn can be fully detected and evaluated by a digital fundus camera. For premature infants, part of the ACA is not visible physiologically; however, it should not be misdiagnosed as angle closure or a narrow angle.

Purpose The aim of this study was to investigate the prevalence of age-related macular degeneration (AMD) and the risk factors in the residents aged ≥50 years in Hainan Province. Methods Random sampling was carried out in four separated cities in Hainan Province in 2015. All the subjects accomplished the standard questionnaire and ocular examinations. The diagnosis of AMD was performed based on the criteria proposed by Beckman Initiative for Macular Research Classification Committee. Results Three hundred and fifty-seven subjects (15.6%) were diagnosed with AMD, including 267 (11.7%) of early AMD, 64 (2.80%) of intermediate AMD and 24 (1.1%) of late AMD, respectively. The factors associated with the prevalence of AMD included age, educational level, smoking, outdoor activities and diet. The prevalence of AMD increased with age, lower educational level, smoking or less outdoor activities. The prevalence of AMD in those with a diet of meat or eggs was higher compared with a diet of vegetables or fish. The prevalence of early, intermediate and late AMD in the aged population in Hainan Province was 11.7, 2.8 and 1.1%, respectively. Conclusions Age and smoking were the risk factors for AMD, while the educational level and outdoor activities were the protective factors. Early AMD mostly occurred in those aged 50–59 years and 60–69 years, while intermediate and late AMD occurred in 70–79 years and older than 80 years.