Table of Contents - WOC 2012

WOC2012 Abstract Book
FP-EPI-MO 406 (8)
Distribution of Anterior Chamber Biometry Measured by Anterior
Segment Optical Coherence Tomography in Chinese Children and
Adults: The Guangzhou Twin Eye Study
Guo Xinxing (1) , Wang Dandan (1) , Friedman David S (3) , Zhang Jian (1) ,
He Mingguang (1,2)
1. Zhongshan Ophthalmic Center, Sun Yat-sen University
2. UCL Institute of Ophthalmology
3. Wilmer Eye Institute, Johns Hopkins University
Purpose: To describe the distribution of anterior chamber biometric
characteristics in children and adults using anterior segment optical coherence
tomography (AS-OCT).
Method: Nine hundred and thirty-three children aged 8 to 16 years and 652
adults aged 30 to 68 years were identified from a population-based twin study.
AS-OCT was used to collect one scan and the images were analyzed using
custom software. A generalized estimating equation model was used to adjust
for intra-pair correlation.
Results: The angle opening distance, iris thickness, iris curvature, anterior
chamber width and anterior chamber depth were 0.670±0.236 mm,
0.406±0.062mm, -0.025±0.138 mm, 11.70±0.42 mm and 3.15±0.27 mm
respectively in children. These values were 0.426±0.214 mm, 0.440±0.067
mm, 0.102±0.164 mm, 11.65±0.40 mm and 2.83±0.32 mm in adults. After
adjusting for age, older children were found to have wider angles, deeper
anterior chambers and more concave irides. Older adults tended to have
narrower angles, shallower anterior chambers and more convex irides.
Females had narrower angles, shallower anterior chambers, and thinner and
more convex irides in both children and adults.
Conclusions: The pattern of angle width with age was opposite in children and
adults while the gender effects were similar.
FP-EPI-MO 406 (9)
Awareness of Glaucoma Amongst the Rural and Urban Population of
North India
Chopra Rupali (1,2,3) , Chander Ashish (1,2,3) , Kapoor Harpreet (1,2,3) , Chaudhry
Daisy (1,2,3)
1. All India Ophthalmological Society
2. North Zone Ophthalmological Society
3. Punjab Ophthalmological Society
Purpose: To compare awareness levels of glaucoma amongst the rural and
urban population.
Methods: Subjects were randomly selected from the patients and their
attendants visiting the outreach camps and the outpatient department of a
tertiary centre. A structured and validated questionnaire was administered to
all subjects. The response `heard of glaucoma` was defined as awareness.
Knowledge was graded independently by two ophthalmologists. Levels of
awareness and knowledge were compared for the two groups. Demographic
factors like age, gender, literacy levels and history of glaucoma were analysed
for any association with awareness of glaucoma.
Results: The study included 129 rural and 124 urban subjects. Awareness was
significantly higher in the urban (35.4%) as compared to rural population
(24.8%) (p-0.03). Knowledge of the disease was seen in 8.5% of rural and
21.7% of urban population (p