Although She Is Normally Not Aware of Its Existence, Ingrid

question 213

Multiple Choice

Although she is normally not aware of its existence, Ingrid discovers that she has a blind spot in her vision by closing one eye and focusing on a fixed point. What explains why Ingrid has this blind spot in her vision?

• A) She suffers from retinal degeneration.
• B) She is experiencing sensory adaptation.
• C) No photoreceptors are located where the optic nerve leaves the eye.
• D) There is insufficient light to activate her rods.

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