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Various Eye Defects

Updated on October 22, 2011
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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    • profile image

      msawewnkosi NGUBO 

      6 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.

    • profile image

      Godfrey Ayomose 

      6 years ago

      I wil use the knowledge to educate my student thk u!!!

    • profile image

      Justice ikpoku 

      6 years ago

      This site is very educative

    • profile image

      kenpet 

      6 years ago

      this sit has helped me a lot in m work. i love u all

    • profile image

      arathi 

      6 years ago

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

    • profile image

      chintoo 

      6 years ago

      thnx for sciece project

    • profile image

      Angelus 

      6 years ago

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

    • profile image

      murtala surajo dutsin-ma. 

      6 years ago

      very interesting & helpful!

    • profile image

      RESHMA 

      6 years ago

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

    • profile image

      sufniya 

      6 years ago

      it helped me a llllllllllllotttt 4 my project

    • profile image

      Hridyesha Gogoi 

      6 years ago

      It really helped me to complete my asignment.

    • profile image

      saarika murali 

      6 years ago

      thanks a lot it helped me for my science homework

    • profile image

      Rahul John 

      6 years ago

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

    • profile image

      amme 

      6 years ago

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

      but can add more ....

    • profile image

      it's GREAT for ME to KNOW THE 

      6 years ago

      CAUTIONS

    • profile image

      Poornima Vijayan 

      6 years ago

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

    • profile image

      alen 

      6 years ago

      more defects should be added.

    • profile image

      alen 

      6 years ago

      more details should be added.

    • profile image

      rasipriya 

      6 years ago

      you need to give some more information

    • profile image

      shalu raghav 

      6 years ago

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

    • profile image

      akansha 

      6 years ago

      thanks a lot

    • profile image

      johny 

      6 years ago

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

    • profile image

      pathu 

      6 years ago

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

    • profile image

      sophia 

      7 years ago

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

    • profile image

      Thanuja 

      7 years ago

      helped me to complete my FA

    • profile image

      Nsibie emmanuel daniel 

      7 years ago

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

    • profile image

      Efosax 

      7 years ago

      I love dis site its quite informative, i knw i can always refer to dis site for informatn weneva i hav any research to make. Thanks a lot for takin d pains to put this up. U r d best. Keep it up...

    • profile image

      preety gril pebbles 

      7 years ago

      very helpful....................................

    • profile image

      Sir DVD 

      7 years ago

      I really love this, men, it completed. I found everything in there, guys u are really trying. God bless u all.

    • profile image

      Ericson rabino 

      7 years ago

      where is the cataract?

    • profile image

      pevz 

      7 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

    • profile image

      jen men 

      7 years ago

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

    • profile image

      mikel 

      7 years ago

      very helpful! :D

    • profile image

      orton 

      7 years ago

      awesooommmmmmme

    • profile image

      bayaborda nicholo anton I 

      7 years ago

      thanks for the knowledge

    • profile image

      yogalakshmi 

      7 years ago

      it was nice.

    • profile image

      619 

      7 years ago

      it helped me with my homework

      awesum info.

    • profile image

      tissa 

      7 years ago

      it is d best site

    • profile image

      Krishna Mohan sahoo 

      7 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.

    • profile image

      ALETY. SRI VEDA REDDY 

      7 years ago

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

    • profile image

      sinan 

      7 years ago

      good keep updating the information

    • profile image

      Riffin.T.Sajeev 

      7 years ago

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

    • profile image

      VISITOR 

      7 years ago

      thankyou

      THIS INFORMATION HELPED ME A LOT

    • profile image

      Rinu 

      7 years ago

      It helped me a lot.Thanks

    • hassam profile imageAUTHOR

      hassam 

      7 years ago from Pakistan

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

    • profile image

      christen 

      7 years ago

      this info that i received on this website was magnificent i researched it wrote it and it gave me a 100 percent even now i still have the over joyed look on my face. keep up with this site and i promise that u wont stop gettting great comments.

    • profile image

      Tosin 

      7 years ago

      Good work man, though i have not tried it but i feel it is going to work for me

    • profile image

      sanjeev 

      7 years ago

      hey thanks a lot

      it helped me in project

    • profile image

      Steve Veigas  

      7 years ago

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

    • profile image

      RAZZY 

      7 years ago

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

    • profile image

      radhika r from st dominics 

      7 years ago

      thank u

      this really helped me in ma biology project

    • profile image

      meeeee 

      7 years ago

      thank you for helping me with my science project, it helped a lot

    • profile image

      Joel Markovic from caroline chisolm 

      7 years ago

      thanks

      ur the bset

      but i failed :(

      and i have no friends

    • profile image

      anba 

      7 years ago

      thanks for providing good information

    • profile image

      t.c 

      8 years ago

      this really helped me in ma biology home work a lot

      !!!!!!!thanks!!!!!!

    • profile image

      J. K. Tyagi 

      8 years ago

      Excelent information.

    • profile image

      kushal 

      8 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.

    • profile image

      aira 

      8 years ago

      thanks!! it helped a lot:))))

    • profile image

      JR 

      8 years ago

      IT HELPED ME WITH MY PROJECT .....

      THANKS A LOT,..

    • profile image

      jr 

      8 years ago

      i like it........ thanks.....

    • profile image

      krizzian 

      8 years ago

      thanks for the answer!@!

    • profile image

      kila 

      8 years ago

      nice!!!! thanks for helping me

    • profile image

      Bako Ismail 

      8 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.

    • profile image

      Deepesh 

      8 years ago

      it helped in my science project..

      thnxxx!!!!

    • profile image

      bassey peter 

      8 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

    • profile image

      nazz-ra 

      8 years ago

      good information

    • profile image

      angel 

      9 years ago

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

    • profile image

      KHUSHBOO 

      9 years ago

      IT'S GREAT FOR STUDENTS!

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