What is the job of the retina?
Retina, layer of nervous tissue that covers the inside of the back two-thirds of the eyeball, in which stimulation by light occurs, initiating the sensation of vision. The retina is actually an extension of the brain, formed embryonically from neural tissue and connected to the brain proper by the optic nerve.
Why is the retina so important?
Your retina is an essential part of your vision as it’s responsible for turning light rays into images through signals to the brain. When there’s a problem with your retina due to eye disease, ocular trauma or other conditions, you run the risk of causing long-term damage to your eyesight.
What happens if the retina is damaged?
Damage to the retina often leads to vision loss. Medical experts explain that when the retina is injured through disease or an accident, blood vessels are affected. The veins carry neurons between the optic nerve and the brain. When they are damaged, neurons die, and the brain doesn’t receive visual information.
What is the most important part of the retina?
The macula (macular zone, yellow spot) is the most important part of the retina.
How does the retina see color?
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.
How can I have a healthy retina?
How to Improve the Health of the Retina
- Healthy and balanced diet. Poor diet containing insufficient nutrients can cause the health of the retina to degrade.
- Avoiding unhealthy foods and drinks.
- Drinking plenty of water.
- Regular exercise.
- Wearing sunglass when out in the sun.
- Quitting smoking.
- Wearing eye protection.
- Regular eye check-up.
What are retina problems?
A retinal disorder or disease affects this very important tissue, which, in turn, can affect vision to the point of blindness. Common retinal conditions include floaters, macular degeneration, diabetic eye disease, retinal detachment, and retinitis pigmentosa.
Where does light go once it hits the retina?
When light hits the retina (a light-sensitive layer of tissue at the back of the eye), special cells called photoreceptors turn the light into electrical signals. These electrical signals travel from the retina through the optic nerve to the brain. Then the brain turns the signals into the images you see.
How do you tell if your retina is damaged?
What are the symptoms of a damaged retina?
- Dim vision.
- Blurring of vision.
- Flashes of light.
- Peripheral shadows: shadows in the edges of the eyes.
- Floaters: appearance of floating specks, cobwebs, or lines.
- Black spots.
- Distorted shapes.
- Difficulty reading or performing tasks that require detailed vision like embroidery or painting.
Is retinal damage reversible?
In many cases, damage that has already occurred can’t be reversed, making early detection important. Your doctor will work with you to determine the best treatment. Treatment of retinal disease may be complex and sometimes urgent.
Does retinal damage heal?
It may take several months for your vision to return. Some people don’t get all of their vision back, especially in more severe cases. A detached retina won’t heal on its own. It’s important to get medical care as soon as possible so you have the best odds of keeping your vision.
What keeps the retina attached?
The Normal Vitreoretinal Architecture: What Keeps the Retina Attached? The first is the retinal pigment epithelium (RPE) pumping fluid out of the (thus virtual) subretinal space toward the choriocapillaris . Drugs that interfere with this active transport reduce retinal adhesiveness .
What would happen if the retina gets folded and wrinkled?
When the scar tissue contracts, it causes the retina to wrinkle, or pucker, usually without any effect on central vision. However, if the scar tissue has formed over the macula, our sharp, central vision becomes blurred and distorted.
What are the 3 layers of the retina?
The cellular layers of the retina are as follows: 1) The pigmented epithelium, which is adjacent to the choroid, absorbs light to reduce back reflection of light onto the retina, 2) the photoreceptor layer contains photosensitive outer segments of rods and cones, 3) the outer nuclear layer contains cell bodies of the