Which test is used to assess stereopsis?

The Wirt Test is specifically designed to measure stereopsis, which is the ability to perceive depth and three-dimensional structure from visual information in the two-dimensional image the eyes provide. This test typically uses a series of images or patterns that require the viewer to engage both eyes to perceive depth differences, allowing practitioners to evaluate the binocular vision and depth perception more accurately.

Stereopsis is an important visual function for many daily tasks and activities, and testing for it helps to identify individuals who might have issues with binocular vision. The Wirt Test, therefore, is integral in diagnosing and assessing how well a person can perceive depth, which can influence both their visual performance and overall quality of life.

Other tests mentioned serve different purposes; for example, the Cover Test primarily assesses ocular alignment and ability to fixate, while the Randot Test also assesses depth perception but uses different methodologies. The Snellen Test is mainly used for measuring visual acuity and does not specifically relate to depth perception. Thus, the Wirt Test stands out as the correct choice for assessing stereopsis.