How much does losing vision in one eye affect depth perception?

Loss of vision in one eye, or acquired monocular vision, makes depth perception extremely difficult, especially when gauging the distance within 3 feet of the eye, according to the Neuro-Optometric Rehabilitation Association. Beyond 3 feet, other distance cues help to determine relative distances if the affected person moves his head.

Acquired monocular vision also causes up to a 25 percent reduction in the peripheral field of vision, explains NORA. Combined with problems in depth perception, acquired monocular vision may cause a person to become clumsy and have problems with hand-eye coordination, orientation and activities such as playing sports or driving.