In case if the photo receptors will burn due to some external source like sunlight the what will happen to our eyes?
In case if the photo receptors will burn due to some external source like sunlight the what will happen to our eyes?
Light comes into the eye and goes through all the various layers of cells until it reaches the photoreceptors—essentially, the bottom of a stack of cells. The photoreceptors themselves guide the light towards a specialized structure [of the cells] called the outer segment. Under normal circumstances, the light would interact with the pigment, which generates an electrical signal that then starts the process of sending an impulse through the optic nerve to the brain.
In looking at the sun, you have a very large volume of photons—light energy—coming in and hitting these pigment discs, and it’s more than they can really handle. In addition to generating the electrical signal, [the cell] also starts generating photo-oxidative compounds. So you’re getting oxidative species like hydroxyl radicals and peroxides that will go on to attack the cell’s organelles.
If the exposure goes on long enough, there will be enough accumulation of these phototoxic products that the cell will be damaged. If you have enough of this damage accumulated, not only will you get a loss of function of the photoreceptor, but you can, over time, result in that cell being killed.
Thus it effects eyesight.After some amount of time it will recover.Generally, if there is going to be a recovery, we will see something going on after several weeks, and it will take between three months and a year before we know what the overall outlook is for that individual.
Light comes into the eye and goes through all the various layers of cells until it reaches the photoreceptors—essentially, the bottom of a stack of cells. The photoreceptors themselves guide the light towards a specialized structure [of the cells] called the outer segment. Under normal circumstances, the light would interact with the pigment, which generates an electrical signal that then starts the process of sending an impulse through the optic nerve to the brain.
In looking at the sun, you have a very large volume of photons—light energy—coming in and hitting these pigment discs, and it’s more than they can really handle. In addition to generating the electrical signal, [the cell] also starts generating photo-oxidative compounds. So you’re getting oxidative species like hydroxyl radicals and peroxides that will go on to attack the cell’s organelles.
If the exposure goes on long enough, there will be enough accumulation of these phototoxic products that the cell will be damaged. If you have enough of this damage accumulated, not only will you get a loss of function of the photoreceptor, but you can, over time, result in that cell being killed.
Thus it effects eyesight.After some amount of time it will recover.Generally, if there is going to be a recovery, we will see something going on after several weeks, and it will take between three months and a year before we know what the overall outlook is for that individual.
