The retina contains

The retina contains

• A. Iris and pupil
• B. Optic nerve fibers
• C. Cornea
• D. Rods and cones

Answer: (D)

Photoreceptors in the retina are the cells that detect light. These come in two main types: rods, which sense light levels and enable vision in dim conditions, and cones, which detect color and provide sharp detail in bright light. When light hits these cells, it is converted into electrical signals that pass through bipolar and ganglion cells and travel to the brain via the optic nerve for processing. The iris and pupil are parts of the eye’s outer structure that regulate light entry, and the cornea is the clear front surface that helps focus light. While retinal nerve fibers do contribute to the optic nerve, the retina is defined by containing rods and cones—the cells responsible for converting light into neural signals.

Photoreceptors in the retina are the cells that detect light. These come in two main types: rods, which sense light levels and enable vision in dim conditions, and cones, which detect color and provide sharp detail in bright light. When light hits these cells, it is converted into electrical signals that pass through bipolar and ganglion cells and travel to the brain via the optic nerve for processing. The iris and pupil are parts of the eye’s outer structure that regulate light entry, and the cornea is the clear front surface that helps focus light. While retinal nerve fibers do contribute to the optic nerve, the retina is defined by containing rods and cones—the cells responsible for converting light into neural signals.