Rapid assessment of visual impairment (RAVI) in marine fishing communities in South India--study protocol and main findings.
Rapid assessment of visual impairment (RAVI) in marine fishing communities in South India--study protocol and main findings.
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DOI：
10.1186/1471-2415-11-26
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发表时间：
2011-09-19
影响因子：
2
通讯作者：
Rao GN
中科院分区：
文献类型：
--
作者：
Marmamula S;Madala SR;Rao GN
可靠的数据是规划眼科护理服务的先决条件。虽然传统的横断面研究提供可靠的信息，他们是资源密集型的。采用一种新的快速评估方法，调查40岁及以上受试者视力损害和老视的患病率和原因。本文介绍了视力损害快速评估（RAVI）项目的详细方法和研究程序。在印度安得拉邦Prakasam区沿海地区采用整群随机抽样进行了一项以人口为基础的横断面研究，该地区主要居住着渔业社区。使用Snellen视力表在6米的距离处评估无辅助、辅助和针孔视力（VA）。如果任一眼的VA < 6/12，则使用针孔重新评估VA。近视力采用双眼N标记视力表进行评估。视力受损定义为较好眼VA < 6/18。老视定义为双眼远视力为6/18或更好的受试者的双眼近视力低于N8。数据收集在不到12周的时间内完成，使用两个团队，每个团队由一名辅助医疗眼科人员和两名社区眼科健康工作者组成。视力损害的患病率为30%（95%CI，27.6-32.2）。这包括111名（7.1%; 95% CI，5.8-8.4）失明患者。白内障是视力损害的首要原因，其次是屈光不正。根据WHO定义的失明患病率（表现为视力较好的眼睛视力< 3/60）为2.7%（95%CI，1.9-3.5）。在印度Prakasam地区的海洋渔业社区，视力障碍的发病率很高。这项快速评估调查的数据现在可以作为在该地区开展眼科护理服务的基准。本文报告的快速评估方法（RAVI）是强大的，快速的，并有可能在其他地区复制。
Reliable data are a pre-requisite for planning eye care services. Though conventional cross sectional studies provide reliable information, they are resource intensive. A novel rapid assessment method was used to investigate the prevalence and causes of visual impairment and presbyopia in subjects aged 40 years and older. This paper describes the detailed methodology and study procedures of Rapid Assessment of Visual Impairment (RAVI) project. A population-based cross-sectional study was conducted using cluster random sampling in the coastal region of Prakasam district of Andhra Pradesh in India, predominantly inhabited by fishing communities. Unaided, aided and pinhole visual acuity (VA) was assessed using a Snellen chart at a distance of 6 meters. The VA was re-assessed using a pinhole, if VA was < 6/12 in either eye. Near vision was assessed using N notation chart binocularly. Visual impairment was defined as presenting VA < 6/18 in the better eye. Presbyopia is defined as binocular near vision worse than N8 in subjects with binocular distance VA of 6/18 or better. The data collection was completed in <12 weeks using two teams each consisting of one paramedical ophthalmic personnel and two community eye health workers. The prevalence of visual impairment was 30% (95% CI, 27.6-32.2). This included 111 (7.1%; 95% CI, 5.8-8.4) individuals with blindness. Cataract was the leading cause of visual impairment followed by uncorrected refractive errors. The prevalence of blindness according to WHO definition (presenting VA < 3/60 in the better eye) was 2.7% (95% CI, 1.9-3.5). There is a high prevalence of visual impairment in marine fishing communities in Prakasam district in India. The data from this rapid assessment survey can now be used as a baseline to start eye care services in this region. The rapid assessment methodology (RAVI) reported in this paper is robust, quick and has the potential to be replicated in other areas.
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影响因子：
7.7
作者：
Limburg, H;Kumar, R;Indrayan, A
通讯作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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