Naheed Farah, Ullah Saif, Asgher Mehmoona, Qayyum Sadaf
Department of Optometry and Orthoptics, Pakistan Institute of Ophthalmology, Rawalpindi, Pakistan.
Department of Public Health, Quaid e Azam University, Islamabad, Pakistan.
Saudi J Ophthalmol. 2024 Jan 29;38(1):83-88. doi: 10.4103/sjopt.sjopt_7_23. eCollection 2024 Jan-Mar.
To evaluate and contrast the contrast sensitivity defects present in strabismic and anisometropic amblyopes. And to find out the association of contrast deterioration with the visual acuity of the amblyopic eye, the magnitude of strabismus, and the amount of anisometropia in both groups.
This cross-sectional study was carried out in the orthoptics unit of a tertiary eye care facility between October 2021 and December 2021. There were 45 patients altogether. In the first phase, the patient's history and ocular examination data were recorded after informed consent. The Pelli-Robson chart was used to measure contrast sensitivity. In the second phase, results were interpreted using the SPSS (Statistical Package for the Social Sciences) version 26.0.
Strabismic amblyopes were 24 and anisometropic amblyopes were 21. A significant positive association existed between both groups' contrast sensitivity and visual acuity ( = 0.000). A moderately negative correlation between contrast and anisometropia was statistically significant ( = 0.025) in anisometropic amblyopes. However, no association ( > 0.050) existed between the contrast and magnitude of strabismus in any group.
The study concluded that contrast sensitivity decreases in both groups, whereas anisometropic amblyopes have poorer contrast than strabismic amblyopes. Excessively decreased contrast sensitivity among anisometropic amblyopes was solely because of the worst amblyopia in this group, whereas the magnitude of strabismus does not affect contrast sensitivity.
评估和对比斜视性弱视和屈光参差性弱视患者存在的对比敏感度缺陷。并找出两组中对比敏感度下降与弱视眼视力、斜视程度以及屈光参差量之间的关联。
这项横断面研究于2021年10月至2021年12月在一家三级眼科护理机构的斜视矫正科进行。共有45名患者。在第一阶段，在获得知情同意后记录患者的病史和眼部检查数据。使用贝利-罗伯逊图表测量对比敏感度。在第二阶段，使用社会科学统计软件包（SPSS）26.0版对结果进行解读。
斜视性弱视患者24例，屈光参差性弱视患者21例。两组的对比敏感度与视力之间存在显著的正相关（=0.000）。在屈光参差性弱视患者中，对比度与屈光参差之间的中度负相关具有统计学意义（=0.025）。然而，在任何一组中，对比度与斜视程度之间均无关联（>0.050）。
该研究得出结论，两组患者的对比敏感度均下降，而屈光参差性弱视患者的对比度比斜视性弱视患者更差。屈光参差性弱视患者对比敏感度过度下降完全是因为该组弱视情况最严重，而斜视程度并不影响对比敏感度。
