Dashti Maryam, Riazi Abbas, Ashrafi Majid, Rahmani Saeed, Tabatabaei Seyyed Mehdi
Department of Optometry, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran 1616913111, Iran.
Department of Optometry, School of Rehabilitation, Iran University of Medical Sciences, Tehran 1616913111, Iran.
Int J Ophthalmol. 2024 Oct 18;17(10):1864-1868. doi: 10.18240/ijo.2024.10.13. eCollection 2024.
To investigate the effect of using base-out prisms on nystagmus, visual acuity and contrast sensitivity in patients with albinism.
In this interventional study, patients with albinism who had nystagmus were enrolled. A comprehensive eye exam was conducted, which included refraction, assessment of far and near vision acuity, and contrast sensitivity measurements. To check for the nystagmus, a videonystagmography was used. The tests were carried out in three modes: without any correction, with optical correction, and with correction using base-out prisms in three different powers, including 4, 6, and 8 prism diopters.
Totally 23 patients with average age of 28.65±12.13 were examined. It was found that the use of optical correction and optical correction with prisms resulted in a statistically significant improvement in both far (at least: <0.006) and near visual acuity (at least: <0.001 except for prism 8; <0.02). In addition, contrast sensitivity significantly improved at all low and medium frequencies except for correction with prism 8 in frequency 1.5 (at least: <0.01 except for prism 4, frequency 6; =0.04). no significant improvement was observed in the evaluation of nystagmus characteristics.
Optical correction with a prism can improve visual acuity and some spatial frequencies, but failed to improve nystagmus parameters.
研究使用底向外棱镜对白化病患者眼球震颤、视力和对比敏感度的影响。
在这项干预性研究中，纳入了患有眼球震颤的白化病患者。进行了全面的眼科检查，包括验光、远近视力评估和对比敏感度测量。使用视频眼震图检查眼球震颤。测试以三种模式进行：无任何矫正、光学矫正以及使用三种不同屈光度（4、6和8棱镜度）的底向外棱镜进行矫正。
共检查了23例平均年龄为28.65±12.13岁的患者。发现使用光学矫正和棱镜光学矫正后，远视力（至少：<0.006）和近视力（除8棱镜度外至少：<0.001；<0.02）均有统计学显著改善。此外，除1.5频率下8棱镜度矫正外，所有低、中频的对比敏感度均显著提高（除4棱镜度、6频率外至少：<0.01；=0.04）。在眼球震颤特征评估中未观察到显著改善。
棱镜光学矫正可提高视力和一些空间频率，但未能改善眼球震颤参数。
