What is a calice? Ive heard they form when you start wearing hard contact lenses?

Question

Is it bad?

Answer 1

Okay. Let's back up a bit here. What you are referring to is callous -- the same stuff you get on your feet during the summer when you go barefoot, or that you get on your fingers when something rubs at one particular spot. You can get them on your eye, too, but just like callous anywhere on the body, it's a sign of friction, and the hard contact lenses aren't supposed to generate friction because they ride on a smooth film of moisture (contact lense fluid) which is designed to prevent that problem from arising.
If you have callous on your eyeball, it's a sign that your optician didn't do a very good job of fitting your lenses.
However, all that said, it is a very, very, very rare condition. Most people who wear hard contact lenses (including this wearer) have them for years and years with no problems. Hard contact lenses are actually better than soft contacts, because they are easier to clean and less prone to causing eye infections.
If you have a concern about callous, or anything else, talk with the optometrist, ophthalmologist, or whoever you are getting your lenses from, and double check what I've said.
Bottom line is, because the correction is so specific, your vision is better with hard contacts than soft contacts.

Answer 2

Do you mean Callus? It's similar to the ones you can get on your hands from working with tools. The hard contact rubs against your eye and a callus is formed.
That's part of the reason for the development of soft contacts.

Answer 3

callous
it's similar to what you get on your hands if you work with your hands - a protective thicker layer of cells
not neccesarily a bad thing