Which part is the light-sensitive layer at the back of the eye that forms visual images?

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

Answer: (B)

The retina is the light-sensitive layer at the back of the eye where an image is formed. It houses photoreceptor cells—rods and cones—that detect light, color, and detail, then convert that light into electrical signals sent to the brain for interpretation. Light is focused onto the retina by the cornea and lens, so the retina actually receives the visual information. The pupil is just the opening that lets light in, controlled by the iris; the cornea is the clear front surface that helps bend light, and the iris adjusts how much light enters. The retina’s job is to detect the light and start the process that turns it into what we see.