Department of Optometry, Chung Shan Medical University, Taichung, Taiwan; Department of Optometry, Chung Hwa University of Medical Technology, Tainan, Taiwan.
Department of Ophthalmology, Mennonite Christian Hospital, Hualien, Taiwan; Department of Special Education, National Taiwan Normal University, Taipei, Taiwan.
J Optom. 2020 Oct-Dec;13(4):249-256. doi: 10.1016/j.optom.2019.09.003. Epub 2019 Nov 29.
According to Taiwan optometry act, low-vision services, such as refractive correction and low vision assessment, are now included in Optometric profession. This study was designed to investigate the efficiency of refractive correction and the relationship between refractive correction, eye diseases, visual symptoms, and optical device selection for patients with low vision.
This study involved a total of 220 participants aged from 7 to 99, with 119 males and 101 females. All of them were referred from three institutes of Taiwan Resource Portal of Assistive Technology under the supervision of the Ministry of Health and Welfare during Feb 2016 to Jan 2018. Accordingly, 42, 76, and 102 of the participants were identified as having mild, moderate, and severe visual impairments, respectively, by five experienced and licensed optometrists for this comprehensive low vision examination.
The most common eye diseases in this study were retinal disease, cataract, glaucoma, and optic nerve hypoplasia; some of the participants had multiple eye diseases while participating in the study. Except visual acuity decrease, eye diseases were highly correlated with participants' visual symptoms. Refractive correction is the first step in low-vision examination, therefore, it might be much helpful to some types of eye diseases, visual symptoms, and to the decisions of optical devices for low-vision patients. The results herein suggest that color vision and contrast sensitivity should be taken into consideration when calculating the second optical magnifying power after refractive correction.
Refractive correction is necessary for the treatment of patients' visual symptoms and also for the prescription of low-vision aids.
根据台湾验光师法，低视力服务（如屈光矫正和低视力评估）现已纳入视光学专业。本研究旨在探讨屈光矫正的效果，以及屈光矫正、眼病、视觉症状与低视力患者光学仪器选择之间的关系。
本研究共纳入 220 名年龄 7 至 99 岁的参与者，其中男性 119 名，女性 101 名。所有参与者均由台湾辅具资源整合平台的 3 个研究所于 2016 年 2 月至 2018 年 1 月期间根据卫生福利部的监督转诊而来。相应地，根据 5 位经验丰富且持照的验光师对所有参与者进行的全面低视力检查，其中 42 名、76 名和 102 名参与者分别被确定为轻度、中度和重度视力障碍。
本研究中最常见的眼病是视网膜疾病、白内障、青光眼和视神经发育不良；一些参与者在参与研究时患有多种眼病。除视力下降外，眼病与参与者的视觉症状高度相关。屈光矫正作为低视力检查的第一步，可能对某些类型的眼病、视觉症状以及低视力患者光学仪器的选择决策有较大帮助。本研究结果提示，在计算屈光矫正后的第二光学放大率时，应考虑色觉和对比敏感度。
屈光矫正对于治疗患者的视觉症状以及为低视力辅助器具处方都是必要的。
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