The Explanation for the "Blind Spot" in Our Visual Field

question 3

Multiple Choice

The explanation for the "blind spot" in our visual field is that

• A) the lens cannot focus all of the visual field onto the retina.
• B) blood vessels collect together and enter the eye at the blind spot.
• C) rods are less sensitive to light than are cones.
• 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.

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Definitions:

Lens

A piece of transparent material with at least one curved surface, used to focus or disperse light and form images.

Iris

The colored part of the eye that controls the size of the pupil and the amount of light reaching the retina.

Colored Part

The iris, the circular structure in the eye responsible for controlling the diameter and size of the pupils and thus the amount of light reaching the retina.

Pupil Size

The diameter of the circular opening in the center of the iris of the eye, which can vary in response to light exposure or emotional state.