![Causes of eye defects correction using convex and concave lenses myopia short-sightedness hyperopia long-sightedness IGCSE/GCSE Physics revision notes Causes of eye defects correction using convex and concave lenses myopia short-sightedness hyperopia long-sightedness IGCSE/GCSE Physics revision notes](https://docbrown.info/ephysics/ephyspics/eyelens2.gif)
Causes of eye defects correction using convex and concave lenses myopia short-sightedness hyperopia long-sightedness IGCSE/GCSE Physics revision notes
![a) What is long-sightedness? State the two causes of long-sightedness. With the help of ray diagram, show:i) the eye defect long sightednessii) correction of long-sightedness using a lensb) An eye has a a) What is long-sightedness? State the two causes of long-sightedness. With the help of ray diagram, show:i) the eye defect long sightednessii) correction of long-sightedness using a lensb) An eye has a](https://www.learnatnoon.com/s/in//wp-content/uploads/sites/8/2021/09/refr21-11.jpg)
a) What is long-sightedness? State the two causes of long-sightedness. With the help of ray diagram, show:i) the eye defect long sightednessii) correction of long-sightedness using a lensb) An eye has a
![The near point of a long sighted person is 40 cm from the eye. To read a book held a distance of 25 cm, he will need spectacles containing Chromatic lensesConcave lensesPrismatic The near point of a long sighted person is 40 cm from the eye. To read a book held a distance of 25 cm, he will need spectacles containing Chromatic lensesConcave lensesPrismatic](https://search-static.byjusweb.com/question-images/toppr_ext/questions/572127_338272_ans.png)
The near point of a long sighted person is 40 cm from the eye. To read a book held a distance of 25 cm, he will need spectacles containing Chromatic lensesConcave lensesPrismatic
![Long sightedness corrected with convex lens, illustration - Stock Image - C047/5797 - Science Photo Library Long sightedness corrected with convex lens, illustration - Stock Image - C047/5797 - Science Photo Library](https://media.sciencephoto.com/c0/47/57/97/c0475797-800px-wm.jpg)