Which test is often performed to evaluate a patient’s stereo vision?

The test commonly performed to evaluate a patient’s stereo vision is the stereopsis test. This test specifically measures a person's ability to perceive depth and three-dimensional structures based on the different perspectives of the two eyes. Stereopsis is crucial for activities that require depth perception, such as driving or playing sports, as it allows individuals to perceive the spatial relationships between objects.

During the stereopsis test, patients are often shown patterns or images that require them to use both eyes to interpret depth cues. The results help determine if there are any issues with binocular vision or if one eye may be dominant over the other.

In contrast, other tests listed, like the tonometer test, are primarily focused on measuring intraocular pressure, while the cover test assesses eye alignment and muscle function, and the color vision test evaluates the ability to distinguish different colors. Each of these tests serves a different purpose related to eye health and vision acuity but does not directly measure stereo vision as the stereopsis test does.