Visual acuity

Definition

Visual acuity is the clarity or sharpness of vision, allowing individuals to identify and distinguish fine details. It is a measure of how well a person can see objects at a standard distance, typically evaluated using an eye chart.

Related terms

Optic nerve: The nerve that transmits visual information from the retina to the brain.

Retina:

The light-sensitive layer of tissue at the back of the inner eye that converts light into neural signals.

Refraction: The bending of light as it passes through one medium to another, critical in focusing visual images onto the retina for clear vision