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What part of eye makes the pupil smaller in bright light and larger in dim light?
Wiki User
∙ 12y ago
Iris
Wiki User
∙ 12y ago
The iris is the part of the eye that controls the size of the pupil. In bright light, the iris constricts the pupil to reduce the amount of light entering the eye, while in dim light, the iris dilates the pupil to allow more light to enter and improve vision in low-light conditions.
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