A student with an abnormality in the cones of the eye is most likely to have which vision issue?

A student with an abnormality in the cones of the eye is most likely to have which vision issue?

• A. Night blindness
• B. Peripheral vision loss
• C. Tunnel vision
• D. Poor color vision

Answer: (D)

Cones handle color vision and sharp daytime vision; when they’re not working properly, color discrimination worsens. Night vision relies on rods, and peripheral or tunnel vision involves the outer retina and wider visual field, not the cone system. So a cone abnormality most directly causes poor color vision, because the cone cells are responsible for detecting different colors and producing clear, detailed central vision.

Cones handle color vision and sharp daytime vision; when they’re not working properly, color discrimination worsens. Night vision relies on rods, and peripheral or tunnel vision involves the outer retina and wider visual field, not the cone system. So a cone abnormality most directly causes poor color vision, because the cone cells are responsible for detecting different colors and producing clear, detailed central vision.