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What is the coloured ring of tissue behind the cornea called, that regulates the amount of light entering the eye, by adjusting the
size of the pupil?
Fovea
Retina
Choroid
Iris
- Correct Answer: Option 4, Iris
- The iris is the colored part of the eye behind the cornea. It controls the amount of light entering the eye by changing the pupil's size.
- Option 1: Fovea
- The fovea is a small depression in the retina where visual acuity is highest.
- Option 2: Retina
- The retina is the light-sensitive layer at the back of the eye. It captures images and sends them to the brain.
- Option 3: Choroid
- The choroid is a layer containing blood vessels, located between the retina and the sclera, providing nutrients and oxygen.
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