Define focal point
A) Focal point is when all light rays entering the pupil are entering parallel.
B) Focal point is the distance between the lens and the retina.
C) Focal point is when light is refracted as it passes from the air into the corneal tissues.
D) Focal point is the point at which the light rays from an object intersect on the retina.
E) Focal point is the point at which the light rays from an object intersect on the lens.
Answer: D
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