Myopia and Hyperopia

Hyperopia or farsightedness is a common eye deficiency which inhibits the ability of the eye to focus on close objects. This is due to the eyeball being shorter than normal, causing light rays to focus after they reach the retina and blurring images close to the eye. Glasses with convex lenses are required.

Cross section of the eye showing a shorthened eyeball. A convex lens.
Cross section of the eye showing a shorthened eyeball. A convex lens.


Alternatively, if the eyeball is too long, the lens brings light into focus before it reaches the retina, blurring images in the distance. This condition is known as myopia or nearsightedness and requires glasses with concave lenses.

Cross section of the eye showing a lengthened eyeball. A concave lens.
Cross section of the eye showing a lengthened eyeball. A concave lens.
A photo of a road sign, half showing the blurring of background objects and half showing the blurring of foreground objects.




Return to Eye Conditions Index





About Us   Membership   Donating   Resources   Contact Us   Directories   What's New   Get Involved  
Computer Users Group   Site Map   Home