Various Eye Defects

Astigmatism
Astigmatism

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.

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Comments 68 comments

KHUSHBOO 7 years ago

IT'S GREAT FOR STUDENTS!


angel 7 years ago

nice information.....i liked it as a student


nazz-ra 6 years ago

good information


bassey peter 6 years ago

The value of eating a certain food to maintain health was recognized long before vitamins were identified. The ancient medical doctor knew that feeding liver to a patient would help cure night blindness, an illness now known to be caused by a vitamin A deficiency.The advancement of ocean voyage during the Renaissance resulted in prolonged periods without access to fresh fruits and vegetables, and made illnesses from vitamin deficiency common among ships


Deepesh 6 years ago

it helped in my science project..

thnxxx!!!!


Bako Ismail 6 years ago

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.


kila 6 years ago

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krizzian 6 years ago

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aira 6 years ago

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kushal 6 years ago

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.


J. K. Tyagi 6 years ago

Excelent information.


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Joel Markovic from caroline chisolm 5 years ago

thanks

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RAZZY 5 years ago

HEYA IT HELPED MEH IN MY SCIENCE PROJECT. THX A LOT !!!!


Steve Veigas  5 years ago

i cant see properly in both ways far and close what is this defect called


sanjeev 5 years ago

hey thanks a lot

it helped me in project


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hassam 5 years ago from Pakistan Author

Thank You! :) keep checking for more informative articles.


Rinu 5 years ago

It helped me a lot.Thanks


VISITOR 5 years ago

thankyou

THIS INFORMATION HELPED ME A LOT


Riffin.T.Sajeev 5 years ago

It really helped me to do my physics Project on eye defects. Thank you, For this information.


sinan 5 years ago

good keep updating the information


ALETY. SRI VEDA REDDY 5 years ago

THANK U.IT REALLY HELPED IN MY PROJECT AND I WAS THE FIRST IN MY CLASS


Krishna Mohan sahoo 5 years ago

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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619 5 years ago

it helped me with my homework

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bayaborda nicholo anton I 5 years ago

thanks for the knowledge


orton 5 years ago

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mikel 5 years ago

very helpful! :D


jen men 5 years ago

very informative,BIG thanks. It helped me in classroom discussions.Science teaching is enjoyable!


pevz 5 years ago

,.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


Ericson rabino 5 years ago

where is the cataract?


Sir DVD 5 years ago

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preety gril pebbles 5 years ago

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Nsibie emmanuel daniel 4 years ago

I love this advice, i wish the imfomation will spread out using another medium.


Thanuja 4 years ago

helped me to complete my FA


sophia 4 years ago

tnks.i do lie dwn 2rid.nw i kn its not propa. 4rm sophia


pathu 4 years ago

nys...............=)


johny 4 years ago

can -14 eye defect be cureable.....?


akansha 4 years ago

thanks a lot


shalu raghav 4 years ago

thnks 4 science project.........


rasipriya 4 years ago

you need to give some more information


alen 4 years ago

more details should be added.


alen 4 years ago

more defects should be added.


Poornima Vijayan 4 years ago

Good, this is nice for students as well as for adults


it's GREAT for ME to KNOW THE 4 years ago

CAUTIONS


amme 4 years ago

superb...!!!!!!!!!

but can add more ....


Rahul John 4 years ago

It's great. We get information so easy.But more defects ust be added and their corrections.Thanks a lot.........


saarika murali 4 years ago

thanks a lot it helped me for my science homework


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DSCPSNS ARE TOO SHORT...BT IT HELPED ME A LOT...


murtala surajo dutsin-ma. 4 years ago

very interesting & helpful!


Angelus 4 years ago

Many pupils in ma class r suffrin frm eye defcts. Cld it b due to lighting prblm, chalk dust or wat?


chintoo 4 years ago

thnx for sciece project


arathi 4 years ago

i refused to eat carrot but after reading this i ll suerly start eating carrot


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Justice ikpoku 4 years ago

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msawewnkosi NGUBO 4 years ago

I DON'T EVEN KNOW WHAT TO SAY BUT YOU ROCK MEN THAT'S FANTASTIC,NOW I'M GOING TO DILIVE THIS INFORNATION TO ATHER STUDENTS I PROMIC I WONT LET THEM DOWN.

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