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| Prevalence of Blindness and Low Vision amongAdults in Ningxia |
| Jinjin Zhang, Lin Chen, Tian Tian, Haijun Liu, Wei Niu, Xue Zhang, Mengli Ji, Wenjuan Zhuang |
| Ningxia Eye Hospital, People's Hospital of Ningxia HuiAutonomous Region, Yinchuan 750002, China |
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Abstract Objective: To investigate the prevalence of blindness and low vision among adults in Ningxia, calculate the prevalence of blindness and low vision and analyze the main causes. Methods: This was a cross-sectional study. Random and multi-stage cluster sampling was used to select ten survey sites in Ningxia from June 2021 to November 2021, and the participants aged 18 years and above was studied. All participants underwent questionnaire investigation, visual acuity, ocular pressure, fundus photography, and slit lamp examination of eye condition. The related eye diseases including cataract, eye trauma, ametropia, amblyopia, age-related macular degeneration, diabetic retinopathy, glaucoma, uveitis, neurological diseases, unexplained fundus and other eye diseases in adults with blindness and low vision were statistically analyzed. The prevalence rates of single and binocular blindness and single and binocular low vision among people of different ages, genders, educational levels and economic incomes were evaluated and analyzed, and the main causes of blindness and low vision were analyzed. Results: In this study, 6,145 people should be examined, and 5,721 people were actually examined, with a rate of 93.1%. The average age was 64.3±13.5 years old, with males making up 2,558 males (44.70%), and females making up 3,163 females (55.30%). Among 5,721 subjects in Ningxia, 170 (2.97%) were diagnosed as blind. Of these, 146 (2.55%) were monocular blind, and 24 (0.42%) were binocular blind. Low vision affected 285 people (4.98%), of whom 59 (1.03%) had binocular low vision and 226 (3.95%) monocular low vision. The prevalence of blindness and low vision increased with age (χ2=461.74, P<0.001), and decreased with higher education level (χ2=425.60, P<0.001). There was no statistical difference between the different gender group (χ2=0.12, P=0.727). The prevalence of blindness and low vision of the income group of≥10,000 was signifcantly lower than the income group of <10,000 (χ2=79.72, P<0.001). The top four causes of blindness and low vision were cataracts, eye trauma, unexplained fundus disease, and refractive error. Conclusions: Adult's blindness and low vision rates in Ningxia are high. And cataracts, as the principal cause, continue to be the main focus of efforts to prevent blindness there.
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Received: 21 February 2023
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| Fund:National Natural Science Foundation of China (82060182); Ningxia Natural Science Foundation (2023AAC03450) |
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Corresponding Authors:
Ningxia Eye Hospital, People's Hospital of Ningxia HuiAutonomous Region, Yinchuan 750002, China
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