The retina is the nerve layer that lines the back of the eye, senses light, and creates impulses that travel through the optic nerve to the brain. There is a small area, called the macula, in the retina that contains special light-sensitive cells. The macula allows us to see fine details clearly.
The eye has a number of other components. These include the cornea, iris, pupil, lens, optic nerve and vitreous.
The cornea is the clear front window of the eye that transmits and focuses light into the eye.
The iris is the colored part of the eye that helps regulate the amount of light that enters the eye.
The pupil is the dark aperture in the iris that determines how much light is let into the eye.
The lens is the transparent structure inside the eye that focuses light rays onto the retina.
The optic nerve is the nerve that connects the eye to the brain and carries the impulses formed by the retina to the visual cortex of the brain.
The vitreous humor is a clear gel that fills the middle of the eye.
- Retinal artery, central
The blood vessel that carries blood into the eye and supplies nutrition to the retina. The counterpart to the central retinal artery is the central retinal vein, the vessel that carries blood away from the retina.
- Retinal detachment
A separation of the retina from its connection at the back of the eye. The separation usually results from a tear (that is, a rent or rip, not a tear drop) in the retina, which often occurs when the vitreous gel pulls loose or separates from its attachment to the retina. Once the retina has […]
- Retinal electrophysiologic testing
Electrophysiologic retinal testing .
- Retinal fundus
The interior lining of the eyeball, including the retina (the light-sensitive screen), optic disc (the head of the nerve to the eye), and the macula (the small spot in the retina where vision is keenest). The fundus is the portion of the inner eye that can be seen during an eye examination by looking through […]
- Retinal pigment epithelium
The pigment cell layer that nourishes the retinal cells. The retinal pigment epithelium is located just outside the retina and is attached to what is called the choroid, a layer filled with blood vessels that nourish the retina.