AKN / Human / Eyes

What is a retina?
The retina is the light-senstiive layer of nervous tissue lining the back two-thirds of the eyeball, in which stimulation by light occurs, initiating the sensation of vision. (2, 4)

The retina is an extension of the brain. formed embryonically from neural tissue and connected to the brain proper by the optic nerve. (4)

What does the retina do? 
Light that is focused into the eye by the cornea and lens passes through the vitreous cavity onto the retina. (2)
The retina sends light as electrical impulses through the optic nerve to the brain. (2)

What causes light to properly focus onto the retina? 
the length of the eyes from front to back (3)
the shape of the cornea and lens (3)
tHe location of the lens and the cornea releative to each other inside the eye (3)

What happens when light does not properly focus onto the retina? 
Small variations of light properly focused onto the retina can cause myopia. (3)

What is located in the retina?
macula (video at 0:25)

Where is the retina located? 
eye of a human

Antioxidants, particularly vitamin E and vitamin C are recommended to strengthen the retina, as this organ is very sensitive to the action and influences of free radicals. (5) The intake of carotenoids (specifically, lutein and zeaxanthin), and omega-3 fatty acids is beneficial for a healthy retina. (5)

It is also recommended to eat often, but in smaller portions. Separate meals are suggested, with at least 5 meals a day. (5)

Foods harmful for people with retinal detachment are: (5)
* too greasy, salt, and sweet food (5)
* semi-finished products (5)
* canned food and sausages (except homemade) (5)
* alcohol (5)
* trans fats and products with artificial ingredients (5)

What does the retina need to be healthy?
DHA (video at 2:09)
EPA (Video at 2:14)

1. https://www.bioexplorer.net/nerve-cell-types.html/
2. https://www.aao.org/eye-health/anatomy/parts-of-eye
3. https://www.allaboutvision.com/conditions/myopia.htm
4. https://www.britannica.com/science/retina
5. ChatGPT 4, 7/1/230 “What is new news for retina detachment and nutrients?”