Binocular Vision and Vision therapy Clinic, Sankara Nethralaya, 18, College Road, Nugambakkam, Chennai 600006, India.
Binocular Vision and Vision therapy Clinic, Sankara Nethralaya, 18, College Road, Nugambakkam, Chennai 600006, India; Pediatric Ophthalmology and Strabismus, Sankara Nethralaya, 18, College Road, Nugambakkam, Chennai 600006, India.
J Optom. 2020 Jul-Sep;13(3):185-190. doi: 10.1016/j.optom.2020.01.003. Epub 2020 May 31.
The use of ophthalmic instruments requires increased effort on the accommodation and vergence system. This study aimed to understand the prevalence of binocular vision anomalies among ophthalmology trainees attending a surgical training program at a tertiary eye care center.
This prospective cohort study was carried out between April and November 2017 at a tertiary eye care center in South India. All the ophthalmology trainees inducted for the training programs at the institution underwent a comprehensive ophthalmic and binocular vision assessment. Subjects with previous diagnosis of binocular vision dysfunction and vision therapy were excluded.
The mean (SD) age of the subjects was 29 (3) among which 48 were females. Out of the total 75 subjects, 66 had prior surgical experience [range: 1 to 17 years]. Thirty-eight subjects were asymptomatic and 37 were symptomatic. The most common asthenopic symptom was the presence of headache. Forty-one (55%) out of the 75 had a diagnosis of a non-strabismic binocular vision dysfunction. The range of phoria at distance was orthophoria to 14 Prism Diopter (PD) exophoria (mean +/- SD: -1 +/- 3), and at near 4PD esophoria to 25PD exophoria (mean +/- SD: -4 +/- 5). Based on standard diagnostic criteria, 15 subjects (20%) had convergence insufficiency, 14 (19%) had accommodative infacility, 9 (12%) had intermittent divergent squint (IDS), while 3 subjects (4%) had convergence excess.
This study shows the high frequency of binocular vision dysfunctions among ophthalmology trainees joining a tertiary eye care center.
使用眼科仪器会增加调节和聚散系统的负担。本研究旨在了解在一家三级眼科中心参加手术培训计划的眼科受训者中 binocular vision anomalies 的患病率。
本前瞻性队列研究于 2017 年 4 月至 11 月在印度南部的一家三级眼科中心进行。所有进入该机构培训计划的眼科受训者均接受了全面的眼科和 binocular vision 评估。排除有 binocular vision 功能障碍和视觉治疗既往诊断的受试者。
受试者的平均（SD）年龄为 29（3）岁，其中 48 名为女性。在总共 75 名受试者中，有 66 名有先前的手术经验[范围：1 至 17 年]。38 名受试者无症状，37 名有症状。最常见的视疲劳症状是头痛。75 名受试者中有 41 名（55%）诊断为非斜视 binocular vision dysfunction。远距隐斜视范围为正位至 14 棱镜度（PD）外斜视（均值±SD：-1±3），近距 4PD 内斜视至 25PD 外斜视（均值±SD：-4±5）。根据标准诊断标准，15 名受试者（20%）患有集合不足，14 名（19%）患有调节不足，9 名（12%）患有间歇性外斜视，3 名（4%）患有集合过度。
本研究表明，加入三级眼科中心的眼科受训者 binocular vision anomalies 的发病率很高。
