Retina

Definition

The retina is a thin layer of tissue located at the back of the eye that contains photoreceptor cells. It converts light into neural signals that are then sent to the brain for visual recognition.

5 Must Know Facts For Your Next Test

1. The retina consists of two main types of photoreceptor cells: rods and cones.
2. Rods are responsible for vision in low light conditions, while cones detect color and function best in bright light.
3. The macula, a small central area of the retina, is crucial for sharp central vision.
4. Retinal ganglion cells transmit visual information from the photoreceptors to the brain via the optic nerve.
5. Retinal detachment is a serious condition where the retina separates from its underlying tissue, leading to potential vision loss if not treated promptly.

Review Questions

• What are the two main types of photoreceptor cells found in the retina?
• What role does the macula play in vision?
• How do retinal ganglion cells contribute to vision?

Related terms

Rods: Photoreceptor cells in the retina that are sensitive to low light levels.

Cones: Photoreceptor cells in the retina responsible for detecting color and functioning best in bright light.

Optic Nerve: The nerve that transmits visual information from the retina to the brain.