Various Eye Defects
Astigmatism
A defect of vision due to non-sphericity of the cornea. The defect is corrected by using cylindrical surfaced lenses.
Colour-blindness
A genetic defect found usually in males. A colour blind mother will always produce colour blind sons. Colour blind people are unable to differentiate between red and green. It can easily be detected through a special chart with various colour dots.
Long sightedness
Also known as Hypermetropia, it is a defect of vision due to which near objects are not seen clearly. The defect can be corrected by using convex lenses of suitable focal length.
Presbyopia
A defect in which accommodative power is gradually lost with increasing age as the lens' converging power decreases.
Short-sightedness
Also known as Myopia, it is a defect in which one cannot see distant objects properly. It is corrected by using concave lenses of suitable focal length. Patients may possibly become normal with progress in age.
Remember
Certain precautions are always helpful in retaining good eyesight:
* Never read books while lying down. Read while sitting.
* Avoid reading late in the night.
* While reading, make sure that the light falls on the book.
* Watch TV from a distance.
* Use computer filters on your PC screens to avoid direct rays.
* Boiled carrots are the best thing for gaining sharp eyesight.
Comments
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it helped in my science project..
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I realy gained a lot, because I'm the type that like reading while lying down but knowing now that it adds to eye defects i'm now cautious. Thanks.
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very informative. Should spread such awareness among young individuals at very early stages of their life. Apart from web sites should also use other public mediums such as newspaper, Hoaridngs, etc.
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HEYA IT HELPED MEH IN MY SCIENCE PROJECT. THX A LOT !!!!
i cant see properly in both ways far and close what is this defect called
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- Author
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It really helped me to do my physics Project on eye defects. Thank you, For this information.
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THANK U.IT REALLY HELPED IN MY PROJECT AND I WAS THE FIRST IN MY CLASS
My nice age 15 yrs suffering from Eye problem that is not to vision long distant object since last 3 years.As per doctor consent her two eyes eyeball incresing & it causes the above problem. so please give me some tips to cure with the help of yoga or pranayam or any type of exercise.
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,.can i ask if what do you call this defect of the eyes if the retina is not in position or lets say the other eye cannot identify the correct lense for its self?
=pls e-mail me @ ore_pevz@yahoo.com
where is the cataract?
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I love this advice, i wish the imfomation will spread out using another medium.
helped me to complete my FA
tnks.i do lie dwn 2rid.nw i kn its not propa. 4rm sophia
nys...............=)
can -14 eye defect be cureable.....?
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you need to give some more information
more details should be added.
more defects should be added.
Good, this is nice for students as well as for adults
CAUTIONS
superb...!!!!!!!!!
but can add more ....
It's great. We get information so easy.But more defects ust be added and their corrections.Thanks a lot.........
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very interesting & helpful!
Many pupils in ma class r suffrin frm eye defcts. Cld it b due to lighting prblm, chalk dust or wat?
thnx for sciece project
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