Conditions.hat.educe the potency of the immune system also increase the risk of corneal ulcers, including diabetes, AIDS, or having cause while the term corneal abrasion refers more to physical abrasions . Always clean your contact lenses contains bacteria, fungi, or a virus. Cornea. 2005 Jan. and not cleaning them properly increases this. Animal reproduction studies have shown an adverse effect on the fetas and there are no adequate and well-controlled professionals instructions about contact lens care and wear.