What are the advantages or disadvantages of hard contact lenses?
Hard lenses have several of their own advantages and disadvantages. The advantages are, generally, very good quality vision. Also they are very useful if you have certain hereditary conditions that cause distortions of the eye, because their hardness can flatten the eye out and reshape it. Hard lenses can actually be used to temporarily correct near sightedness in some people; while you are sleeping overnight it flattens the eye out and then you can see without it during the day. Hard lenses tend to be better in people who have significantly dry eyes because they suck up less moisture. Now, they have their disadvantages as well. Hard lenses are definitely less comfortable for most people then soft lenses, and they can crack or break. They also tend to be more expensive so if you lose one it's a bigger hit out of pocket. Hard lenses aren't disposable so that means you need to have solutions to clean them, solutions to store them, a lens case, and a pair of glasses if the hard lenses are not working properly and bothering your eyes. So, you need more paraphernalia if you are a hard lens wearer. Another disadvantage of hard lenses is that they tend to mould your eye into a slightly different shape while you wear them, so when you take them out your eye surface is slightly distorted which changes your vision. When you put your glasses on your vision is not quite clear; you call this 'spectacle blur'. Then, over the space of ten or twenty minutes or an hour the eye bounces back to the correct shape and your vision's clear again. In the meantime things can be a little bit blurry.
