hi everyone
Posted: Wed 13 Sep 2006 12:15 pm
i want to ask a question.are there different types of hard contact lenses so if i can't tolerate them i can changev their type?????? or once i can't fit with them it is over 
Welcome to the forum.
Hard lenses are comonly of the RGP or PMMA type.
RGP is rigid gas permeable to allows the eye to breath.
PMMA is a rigid material that does not allow the eye to breath.
Within these catagories different manufacturers use diffent recipies to make these materials.
Many of us (me included) have found that it is the lens solutions that are the problem so we have to experiment to find which is best. I can only tolerate Bausch & Lomb solutions but despite this I still react to the len material.
To overcome this further I use a lubricating eye drop that is relativly viscouse that in effect puts a protective film over the cornea and the eye lid. Then I put my lenses in. It took me a while to find the drops that worked and that I was not sensitive too, but I went from 2 hours uncomfortable lens wear to where I am now averaging +12 hours extremely comfortable lens wear.
Far from a simple answer to a relativly simple and straight forward question
Hope this is of help.
Gareth