Which kind of lens is used and at what position it is placed at will be image formed as laterally inverted?
For short-sighted person, should he use a convex lens for his glasses? Why?

Question

Which kind of lens is used and at what position it is placed at will be image formed as laterally inverted? 
For short-sighted person, should he use a convex lens for his glasses? Why?

anonymous · Answer

for a short sighted person the image from long distances comes and converges BEFORE the retina(screen) so i want to push back the image or in scientific words i want to make my lens more diverged so which type of lens gives me images diverged?

callisto · Answer

concave?

anonymous · Answer

yes!

callisto · Answer

thanks, what about for the first question?

anonymous · Answer

do u know which lens to use? to get inverted image?

callisto · Answer

probably i think it is convex, that's just for making sure i didn't get it wrong, but the real problem is i don't where it locates :S

callisto · Answer

for concave all images are erect..

anonymous · Answer

place yes ur convex lens anywhere between infinity and focus point and get a laterally inverted image if u put it otherwise then its an errect one
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