Pardhan S
Department of Optometry, University of Bradford, West Yorkshire, UK.
Curr Eye Res. 1997 Mar;16(3):252-5. doi: 10.1076/ceyr.16.3.252.15407.
To measure binocular and monocular thresholds to a light detection task in order to investigate binocular summation in the central and peripheral visual fields. The study also aims to investigate any differences in the magnitude of binocular summation in young and older subjects with healthy eyes.
Binocular and monocular thresholds were measured at eccentricities of 0, 5, 15, 25 and 40 degrees nasally and temporally, using the Humphrey Field Analyser. Binocular summation ratios were computed as the binocular sensitivity divided by the "best" monocular sensitivity.
Binocular and monocular sensitivities declined with increasing eccentricity. Binocular summation ratios were shown to be significantly higher for the younger group compared to the older group at all eccentricities.
Using this test, the binocular performance is shown to be lower for the older group at all eccentricities. Results are discussed in terms of age-related cortical cell loss and increased monocular sensitivity difference.
测量光检测任务的双眼和单眼阈值，以研究中央和周边视野中的双眼总和。该研究还旨在调查眼睛健康的年轻和老年受试者在双眼总和程度上的任何差异。
使用汉弗莱视野分析仪，在鼻侧和颞侧0、5、15、25和40度的偏心度下测量双眼和单眼阈值。双眼总和比计算为双眼敏感度除以“最佳”单眼敏感度。
双眼和单眼敏感度随偏心度增加而下降。在所有偏心度下，年轻组的双眼总和比均显著高于老年组。
使用该测试，老年组在所有偏心度下的双眼表现均较低。根据与年龄相关的皮质细胞丢失和单眼敏感度差异增加对结果进行了讨论。
