The retina's primary function is to detect light.

The retina's primary function is to detect light.

• A. Refract light
• B. Detect light
• C. Focus light
• D. Produce tears

Answer: (B)

The retina is where vision begins because it contains photoreceptors that detect light. These cells—rods and cones—respond to light and convert it into electrical signals that travel to the brain via the optic nerve, where the image is formed. Light is not bent or focused there; those tasks are done by the cornea and lens, while tears help keep the eye moist. So the retina’s primary role is to detect light and initiate the neural signals that lead to vision.

The retina is where vision begins because it contains photoreceptors that detect light. These cells—rods and cones—respond to light and convert it into electrical signals that travel to the brain via the optic nerve, where the image is formed. Light is not bent or focused there; those tasks are done by the cornea and lens, while tears help keep the eye moist. So the retina’s primary role is to detect light and initiate the neural signals that lead to vision.