ABSTRACT

Many cognitive assessments include a visual component; however, adults may experience a decline in visual acuity with age. Scores on cognitive assessments of adults with visual impairments are typically lower than adults with normal vision, however, it is unclear if these lower scores are a consequence of cognitive or visual impairment. We measured the impact of simulated visual impairment on a cognitive screening measure. Undergraduate students were administered the Montreal Cognitive Assessment (MoCA) under three vision conditions (20/20, simulated 20/80, simulated 20/200). We found a main effect of vision condition on test performance such that there is a statistically significant difference between scores on the 20/20 and 20/80 conditions and 20/200. However, no differences were observed between 20/80 and 20/200. Participants’ performance decreased with simulated impairments. A secondary between-subject analysis was conducted on a sample of older adults with and without vision impairment; no differences were found.

摘要

许多认知评估包括视觉成分；然而，随着年龄的增长，成年人的视力可能会下降。有视力障碍的成年人的认知评估分数通常低于视力正常的成年人，但是，尚不清楚这些较低的分数是否是认知或视力障碍的结果。我们测量了模拟视觉障碍对认知筛查措施的影响。本科生在三种视觉条件（20/20、模拟 20/80、模拟 20/200）下进行了蒙特利尔认知评估 (MoCA)。我们发现视力条件对测试性能的主要影响，因此 20/20 和 20/80 条件下的分数与 20/200 的分数之间存在统计学上的显着差异。然而，在 20/80 和 20/200 之间没有观察到差异。参与者的表现随着模拟损伤而下降。对有和没有视力障碍的老年人样本进行了二次受试者间分析；没有发现差异。