Table of Contents - WOC 2012

FP-EPI-MO 406 (4)
Prevalence and Associations of Cataract in a Rural Chinese Adult
Population: The Handan Eye Study
Duan Xinrong (1) , Liang Yuanbo (1) , Wang Ningli (1) , Wong Tien Yin (2) , Friedman
David S. (3)
1. Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University
2. Singapore National Eye Centre
3. Wilmer Eye Institute, Johns Hopkins University
Purpose: To estimate the prevalence and risk factors of cataract in a populationbased
Chinese sample.
Methods: Eligible residents underwent a comprehensive ophthalmic
examination including assessment of cataract using the slit lamp-based Lens
Opacities Classification System ¢ó.
Results: Of the 7,557 eligible subjects, 6,830 took part in the study (90.4%
response rate). Of the 6,544 participants (95.8%) who provided lens data, the
prevalence of any cataract surgery in at least one eye was 0.8%. The ageadjusted
(to year 2000 China national census) prevalence of any cataract or
cataract surgery was 24.7% in participants aged 40+ years. Cortical cataract
was the most common (12.3%, based on one randomly selected eye data),
followed by mixed (3.2%), nuclear (1.7%), and PSC (0.2%). The prevalence of
all types of cataract increased with age (P < 0.001). Visual impairment (best
corrected visual acuity < 20/60) was 21% or 12% in PSC or mixed opacities
in the better seeing eye. Myopia was positively associated with all types of
cataract; diabetes was positively associated with any cataract and PSC only
cataracts.
Conclusions: Cataract affects 24.7% of the population 40+ years living in rural
China, with a low surgical rate. Risk factors include myopia and diabetes.
FP-EPI-MO 406 (5)
Prevalence of Cataract Surgery and Postoperative Visual Outcome in
Rural Central India. The Central India Eye and Medical Study
Jonas Jost (1) , Nangia Vinay (2) , Gupta Rajesh (2) , Khare Anshu (2) ,
Sinha Anjit (2)
1. Department of Ophthalmology, University Heidelberg
2. Suraj Eye Institute
Purpose: To determine the prevalence of cataract surgery and the postoperative
visual outcome in rural Central India.
Methods: The population-based Central India Eye and Medical Study included
4711 subjects (age: 30+ years) in rural Central India.
Results: 318 (3.4%) eyes had undergone cataract surgery (prevalence:
5.0±0.3%). Prevalence of cataract surgery was significantly associated with
age (P