Question

The visible coloured ring of the eye is called:

• A. Lens
• B. Retina
• C. Cornea
• D. Iris

Answer 1

The Correct Option is D

The correct option is (D): Iris.

Answer 2

The question asks for the name of the coloured ring you can see at the front of the eye. Checking each structure listed:

1. Lens: The lens sits behind the pupil and is completely clear. It bends light onto the retina but has no colour of its own and cannot be seen just by looking at someone's eye from the front.
2. Retina: The retina is the light-sensitive layer lining the back of the inside of the eyeball. It is an internal structure and is never visible from outside the eye.
3. Cornea: The cornea is the clear, dome-shaped front window of the eye that covers the iris and pupil. Because it is transparent, you look through it, not at it, so it is not the coloured part you notice.
4. Iris: The iris is the ring-shaped muscle sitting just behind the cornea, and it contains the pigment that gives eyes their brown, blue, green, or grey colour. It also controls how much light enters by adjusting the size of the pupil at its centre.

Only one of these four structures carries pigment and sits where it can be seen directly through the clear cornea, which is why it is the part people describe as the "colour" of someone's eyes.

So the correct answer is the Iris.