Stern Benjamin, Parnasa Elhanan, Forer Yaara, Tessler Idit, Kruger Joshua M
Department of Ophthalmology, Hadassah Medical Center, Kiryat Hadassah, Jerusalem 91120, Israel.
Hebrew University-Hadassah School of Medicine, Jerusalem 91120, Israel.
Clin Ophthalmol. 2020 Jun 29;14:1799-1804. doi: 10.2147/OPTH.S258949. eCollection 2020.
Reliable visual field testing requires the tested eye to be fixated on a central target. This poses a major obstacle for eyes with severe central vision loss. This pilot study assesses whether it may be feasible to examine such patients with a modified method.
A green filter was placed over the fellow eye. A FASTPAC algorithm was used with a red stimulus. The green filter prevented transmission of the red stimuli but allowed visualization of the yellow fixation light. Subjects were tested by both the conventional and the novel method, performed in a randomized order. We compared the reliability indices and also the precision of the two methods.
We present results from six patients. The novel method was associated with an 85% reduction in fixation losses (P=0.028) and a 58% reduction in eye motion on gaze tracking (P=0.007). Further, specialized testing in one of the volunteers demonstrated that the novel technique could more precisely define a small zone of preserved peripheral vision (P=0.008).
The results of this pilot study suggest that the novel method described may be a feasible strategy for visual field testing in patients with unilateral severe central vision loss.
可靠的视野测试要求被测试眼注视中央目标。这对严重中央视力丧失的眼睛构成了主要障碍。这项初步研究评估了使用改良方法检查此类患者是否可行。
在另一只眼睛上放置绿色滤光片。使用FASTPAC算法和红色刺激。绿色滤光片阻止红色刺激的传输，但允许黄色注视光可见。受试者通过传统方法和新方法进行测试，测试顺序随机。我们比较了两种方法的可靠性指标和精度。
我们展示了6名患者的结果。新方法使注视丢失减少了85%（P = 0.028），注视跟踪时的眼球运动减少了58%（P = 0.007）。此外，对一名志愿者进行的专门测试表明，新技术可以更精确地定义保留的周边视野的小区域（P = 0.008）。
这项初步研究的结果表明，所描述的新方法可能是单侧严重中央视力丧失患者视野测试的可行策略。
