The amount of light entering eye is controlled by ________.

The correct answer is Pupil.Key Points

• The amount of light entering the eye is controlled by the pupil.
• The pupil is a small empty space surrounded by the iris.
• The iris contracts and relaxes to regulate the size of the pupil.
• When it is dark, the pupil expands to allows more light to enter the eye.
• Iris controls the pupil which inturn controls the amount of light entering the eye.The pupil is just an adjustable opening, the iris is a membrane.
• When it is bright, the pupil contracts to prevent more light from entering the eye.