The Reason for a "Blind Spot" in the Visual Field

question 73

Multiple Choice

The reason for a "blind spot" in the visual field is that

• A) rods are less sensitive to light than are cones.
• B) blood vessels collect together and enter the eye at the blind spot.
• C) the lens cannot focus all of the visual field onto the retina.
• D) retinal cells die with age and overuse, resulting in blind spots.
• E) there are no photoreceptors in the retina where the axons exit the eye.