Which term is the light-sensitive layer located at the back of the eye?

Which term is the light-sensitive layer located at the back of the eye?

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

Answer: (A)

The retina is the light-sensitive neural layer that lines the back of the eye. It contains photoreceptors—rods for detecting light intensity and movement, and cones for color and fine detail. When light reaches these cells, they convert it into electrical signals that travel through the retinal layers to the ganglion cells and along the optic nerve to the brain for interpretation. The retina sits opposite the lens, supported by the choroid, and includes specialized areas like the fovea for sharp central vision. While the cornea and lens shape and focus light, and the iris controls how much light enters, the retina is where light first becomes a neural signal.

The retina is the light-sensitive neural layer that lines the back of the eye. It contains photoreceptors—rods for detecting light intensity and movement, and cones for color and fine detail. When light reaches these cells, they convert it into electrical signals that travel through the retinal layers to the ganglion cells and along the optic nerve to the brain for interpretation. The retina sits opposite the lens, supported by the choroid, and includes specialized areas like the fovea for sharp central vision. While the cornea and lens shape and focus light, and the iris controls how much light enters, the retina is where light first becomes a neural signal.