Which of the following adjust the size of pupil?

Sphincter muscles

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Opthalmoscope

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Iris dilator

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Both A and C

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Solution

The correct option is C Opthalmoscope
The iris is the coloured circular structure concentrically surrounding the center of the eye, the pupil, which appears to be black. The size of the pupil, which controls the amount of light entering the eye, is adjusted by the iris's dilator and sphincter muscles. A device known as an ophthalmoscope is used to see inside the eye. Therefore, the correct answer is option B.

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