Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Visual acuity refers to the sharpness and clarity of vision, specifically the ability to see fine details. It is determined by the ability of the eye's retina to detect and process light.
The retina is the light-sensitive layer at the back of our eye that contains cells called photoreceptors, which play a crucial role in visual acuity.
Snellen Chart: A Snellen chart is an eye chart used by optometrists to measure visual acuity. It consists of letters or symbols that decrease in size from top to bottom, allowing individuals to determine how well they can see at various distances.
Myopia (Nearsightedness): Myopia is a condition where individuals have difficulty seeing distant objects clearly due to elongation of the eyeball or excessive curvature of the cornea. It can affect visual acuity negatively.