Diabetes causes a thickening of the vessels from the retina. That is causing
a pressure between the retina and the back side of the eye on which is
located the retina. In time, that pressure increases and causes the
"exfoliation" or detachment of the retina from its support.
Burned retina is a totally improper term, since the retina never burns. UV
radiation does not reach the retina, because the lens absorbs it, while
infrared radiation actually heals the retina. Near-infrared light which is
able to increase the amount of energy in cells, say researchers at the
Medical College of Wisconsin. They studied the new methods in rats whose
retinas had been damaged by methanol, a toxic chemical. It is known that
methanol harms the mitochondria, the energy-producing structures within the
cells. But exposure to an LED light could prevent this damage. The
researchers believe that this method, which they call photobiomodulation,
may turn out to be a non-invasive way of treating retinal injury and
preventing blindness.
The "burned retina" is an area from the central side of the retina where the
cells become depleted in some chemicals (photopigments) due to prolonged
exposure to intense light. When
the photopigment is struck by a photon it instantly snaps or uncoils. As the
number of snapping photopigments within the inner segment increases, the
intensity of the nerve output from the cell also increases.
The rods and cones are fitted with a small ionic "pump" that continuously
expels ions of sodium (Na+) inside the cell as it brings ions of potassium
(K+) from outside. The resulting imbalance produces a small, steady electric
current across the cell body. The action of light can increase or decrease
this baseline electric potential. In other words, the rods and cones produce
a continuous visual signal, unlike other sensors which are active only when
stimulated.

Petre


What is retina detachment?

I read on a website, under FAQs that some people have burned their retinas.
What are the things to avoid in that case?

Riff





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