The layer at the back of the eye on which an image is focused.

The layer at the back of the eye on which an image is focused.

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

Answer: (A)

The main idea is where the eye forms the image. Light is focused by the cornea and the lens onto a light-sensitive layer at the back of the eye called the retina. The retina is the layer that receives the focused image and contains photoreceptors (rods and cones) that convert light into electrical signals, which travel to the brain via the optic nerve to create vision. The pupil is just the opening that lets light in, the lens helps focus by changing shape, and the cornea provides most of the focusing power, but none of those form the image on the back surface like the retina does.

The main idea is where the eye forms the image. Light is focused by the cornea and the lens onto a light-sensitive layer at the back of the eye called the retina. The retina is the layer that receives the focused image and contains photoreceptors (rods and cones) that convert light into electrical signals, which travel to the brain via the optic nerve to create vision. The pupil is just the opening that lets light in, the lens helps focus by changing shape, and the cornea provides most of the focusing power, but none of those form the image on the back surface like the retina does.