Abstract:AIM: To investigate the prevalence rate of visual impairment caused by refractive error among residents aged 40 years and above, and the influence factors of vision correction.
METHODS: We conducted an epidemiological survey of diabetes and diabetic retinopathy among residents aged 40 and above in Guangdong Province, Hengli Town, Dongguan City from 2011 to 2012. At the same time, according to World Health Organization(WHO), according to the daily life vision, 0.05≤visual ability <0.3, butabilitin the better eye, we screened a total of 707 cases of visual impairment. Analysis of the prevalence of visual impairment caused by refractive error, comparison of correction rate of visual impairment caused by refractive error, in different gender, age groups and different cultural level, analysis of the influence factors of vision correction were carried out.
RESULTS: The prevalence rate of visual impairment was 7.90%(707/8 952). The prevalence rate of visual impairment caused by refractive error was 5.57%(499/8 952), accounted for visual impairment of 70.58%(499/707). The prevalence rate of correction of refractive error among visual impairment was 5.36%(480/8 952), accounting for visual impairment of 67.89%(480/707). The prevalence rate of visual impairment uncorrected was 0.21%(19/8 952), accounting for visual impairment of 2.69%(19/707). By χ2 test, with the increase of age, the rate of visual impairment caused by refractive error was significantly decreased(P<0.01). The visual impairment caused by refractive error were significant differences in the degree of culture(P<0.01), but no statistical significance in terms of gender(P>0.05). The rate of visual impairment can be corrected decreases with age, from 92.1% to 49.1%, there was a statistically significant difference(P<0.01). The rate of visual impairment can be corrected in more than primary school culture degree was higher than primary school and below education, there was a statistically significant difference(P<0.01). The rate of visual impairment can be corrected was no statistical difference in gender(P>0.05).
CONCLUSION: Through the development of refractive error correction of positive, can make the daily life of visual impairment in about 2/3 of patients improve eyesight and improve the quality of life of residents.
