Which of the following is a characteristic of the fovea in the eye?

This area has more rods than cones are found

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This area has a high density of cones but has no rods

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The optic nerve leaves the eye from this area

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Only rods are present in this area

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Solution

The correct option is B
This area has a high density of cones but has no rods

The fovea is a pit in the retina where images are focused. It has a high density of cones but it has no rods. The fovea permits detailed vision.
The blind spot is the point in the retina where the optic nerve exits the eye. There are no photoreceptors which make this blind spot insensitive to light.

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Question 7

Which of the following statements is correct regarding rods and cones in the human eye?
(a) Cones are sensitive to dim light
(b) Cones are sensitive to bright light
(c) Rods are sensitive to bright light
(d) Rods can sense colour

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