Myopia aka Short Sighted

 

This week we are taking a look a short sighted which has the medical name “myopia, a short-sighted person may see things close to them very clearly, but other things may be blurry.

There are two main reasons for this one is an eyeball that is too long, the other is a lens that is too thick, the longer the eyeball or the thicker the lens, the more short sighted some will be.

Light rays are bent by the cornea and the lens, these should focus them so that an image forms on the retina, however, if someone is short sighted the light rays are focus in front of the retina. This causes the image to be blurry.

Being short sighted is generally picked up in childhood and can beia corrected with glasses or contact lenses, by doing so the light rays are bent outwards by a concave lens before they reach the eye.

Laser treatment is very popular and highly successful; this involves using a laser beam to alter the curve of the front of the cornea to make the image focus on the retina.