ASTIGMATISM – MORE MYSTERIES OF OPTHAMOLOGY EXPLAINED WITH EASE!

An astigmatism is some sort of anomaly occuring in the eye that requires more strength (usually) for your glasses, over and above the normal eyeball-elongation that is causing myopia. It’s due to a mis-shaping of either your cornea or lens and so has to be corrected for, in addition to the normal axial elongation of the eyeball. The two eyeballs below have the same axial elongation, but the lower one also has a rather bent cornea, so the glasses will need extra correction. Mystery explained!