巩膜搜索线圈镜片佩戴对眼睛的影响。
The effect of scleral search coil lens wear on the eye.
作者信息
Murphy P J, Duncan A L, Glennie A J, Knox P C
机构信息
Department of Vision Sciences, Glasgow Caledonian University, Glasgow, UK.
出版信息
Br J Ophthalmol. 2001 Mar;85(3):332-5. doi: 10.1136/bjo.85.3.332.
BACKGROUND/AIM: Scleral search coils are used to measure eye movements. A recent abstract suggests that the coil can affect the eye by decreasing visual acuity, increasing intraocular pressure, and damaging the corneal and conjunctival surface. Such findings, if repeated in all subjects, would cast doubt on the credibility of the search coil as a reliable investigative technique. The aim of this study was to reassess the effect of the scleral search coil on visual function.
METHODS
Six volunteer subjects were selected to undergo coil wear and baseline measurements were taken of logMAR visual acuity, non-contact tonometry, keratometry, and slit lamp examination. Four drops of 0.4% benoxinate hydrochloride were instilled before insertion of the lens by an experienced clinician. The lens then remained on the eye for 30 minutes. Measurements of the four ocular health parameters were repeated after 15 and 30 minutes of lens wear. The lens was then removed and the health of the eye reassessed.
RESULTS
No obvious pattern of change was found in logMAR visual acuity, keratometry, or intraocular pressure. The lens did produce changes to the conjunctival and corneal surfaces, but this was not considered clinically significant.
CONCLUSION
Search coils do not appear to cause any significant effects on visual function. However, thorough prescreening of subjects and post-wear checks should be carried out on all coil wearers to ensure no adverse effects have been caused.
背景/目的：巩膜搜索线圈用于测量眼球运动。最近的一篇摘要表明，该线圈可能会通过降低视力、升高眼压以及损伤角膜和结膜表面来影响眼睛。如果在所有受试者中都重复出现此类结果，将会使搜索线圈作为一种可靠研究技术的可信度受到质疑。本研究的目的是重新评估巩膜搜索线圈对视觉功能的影响。
方法
选取6名志愿者受试者佩戴线圈，并对其进行LogMAR视力、非接触眼压测量、角膜曲率测量和裂隙灯检查的基线测量。在经验丰富的临床医生插入镜片前滴入4滴0.4%盐酸丁氧普鲁卡因。然后镜片在眼睛上保留30分钟。佩戴镜片15分钟和30分钟后，重复测量这四项眼部健康参数。随后取下镜片并重新评估眼睛的健康状况。
结果
在LogMAR视力、角膜曲率测量或眼压方面未发现明显的变化模式。镜片确实对结膜和角膜表面产生了变化，但这在临床上不被认为具有显著意义。
结论
搜索线圈似乎不会对视觉功能造成任何显著影响。然而，应对所有佩戴线圈者进行全面的预筛选和佩戴后检查，以确保未造成任何不良影响。
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