Estimating Visual Acuity Without a Visual Acuity Chart.

ABSTRACT:

Purpose

This study explored whether visual acuity (VA) can be inferred from self-reported ability to recognize everyday objects using a set of yes/no questions.

Methods

Participants answered 100 yes/no questions designed to assess their ability to recognize familiar objects at typical viewing distances, such as distinguishing between a full moon and a half moon on a clear night. The questions demanded VA ranging from normal to severe vision impairment. Responses were analyzed using item response theory, and the results were compared with participants' VA values.

Results

We recruited 385 participants from 4 sites in the United States. Participants had a mean age of 56.7 years with VA ranging from -0.3 to 2.0 logarithm of the minimum angle of resolution (logMAR) (mean =

SUBMITTER: Wu YH 

PROVIDER: S-EPMC11412607 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature