How does ur eye sight go bad?!
Question: For most people, your eyes "grow" bad (meaning blurry vision). If the eye grows too long, you become nearsighted. Too short, farsighted. Irregular, astigmatism. Usually, these problems are hereditary.
Also, as one ages they eye loses focusing power due to rigidity in the lens and muscle strength. This is called presbyopia and results in needing reading glasses.
For "worse" kinds of bad, amblyopia occurs when vision from an eye isn't used by the brain while visual function is developing at young ages. This usually occurs when the eyes are focused differently or are crossed. When this occurs, even though the eye may see clearly (with glasses), the brain just ignores the image, as it has had to suppress the image during development for good vision.
Other common causes of "bad' vision are retinal detachment where the image-receiving nerves peel away from the support tissue, glaucoma where nerves are damaged in the eye due to increased pressure, cataracts where the lens becomes cloudy, and age-related macular degeneration where nerves in the central part of the retina become malnourished due to hardening arteries.
Some other common problems are keratoconus where the cornea thins and bulges and neovascularization where blood vessels grow where aren't supposed to (a frequent problem with contact lens abuse).
Of course, there are also more obvious and direct causes such as trauma, abuse (hygiene, staring at the sun, splashing chemicals in the eye), or infection/disease.
There are more, but hopefully this list helps. With so many possible problems, it's important to get regular check-ups.
Answers: For most people, your eyes "grow" bad (meaning blurry vision). If the eye grows too long, you become nearsighted. Too short, farsighted. Irregular, astigmatism. Usually, these problems are hereditary.
Also, as one ages they eye loses focusing power due to rigidity in the lens and muscle strength. This is called presbyopia and results in needing reading glasses.
For "worse" kinds of bad, amblyopia occurs when vision from an eye isn't used by the brain while visual function is developing at young ages. This usually occurs when the eyes are focused differently or are crossed. When this occurs, even though the eye may see clearly (with glasses), the brain just ignores the image, as it has had to suppress the image during development for good vision.
Other common causes of "bad' vision are retinal detachment where the image-receiving nerves peel away from the support tissue, glaucoma where nerves are damaged in the eye due to increased pressure, cataracts where the lens becomes cloudy, and age-related macular degeneration where nerves in the central part of the retina become malnourished due to hardening arteries.
Some other common problems are keratoconus where the cornea thins and bulges and neovascularization where blood vessels grow where aren't supposed to (a frequent problem with contact lens abuse).
Of course, there are also more obvious and direct causes such as trauma, abuse (hygiene, staring at the sun, splashing chemicals in the eye), or infection/disease.
There are more, but hopefully this list helps. With so many possible problems, it's important to get regular check-ups.
age and or heredity..
Age, genes, and poor care. Poor care would be like, staring at the computer screen or TV too long or may be too bright (eyes need exercise!). Staring at something small (like a handheld game) strains the eyes too.
I think for most, it lies in the genes.
Eyesight going bad usually means that the shape of your eyeballs, which you need to have perfect to see perfectly, has changed. It could grow longer, grow shorter or grow irregular. That would make you near-sighted, far-sighted, or astigmatic.
As they get older (40-50) most people's eyes tend to change, usually getting shorter so they need glasses for reading closeup.
Rarely people have diseases (diabetes or glaucoma) that cause damage to their optic nerves and that makes areas in their visual fields that do not work so they lose vision in specific directions (straight ahead or off to the edges).
More rapid changes could be due to injuries that cause a detached retina or major amounts of floaters.