Q: Reusing daily contact lenses will cause what dangers?
When daily contact lenses are used again and again it will cause a big risk of contracting conjunctivitis. Conjunctivitis is the inflammation of the conjunctiva, the inner surface of the eyelids. The eyes can become red and watery, and a nasty discharge can be produced. If the lenses are being used again and again, bacteria may grow, which can lead to this infection.
Daily contact lenses are not made to be cleaned. If daily contact lenses are used again and again, you are putting unclean lenses into contact with your eye every day. This can cause corneal neovascularization, which is when there is excessive growth of the blood vessels in the cornea. This is caused by lack of oxygen in the eye, and is very common in users of contact lenses. In the very worst cases, eyesight can be threatened. This is why it is important to have regular checkups at the optician's.
In the end, what is preventive measures?
Contact lense users may get eye infections because of the risk of bacteria from hands when inserting the lense. If using daily contacts again and again, you will increase the risk of infection because the lens may tear or start to degrade. The lense may also change in shape and will not be comfortable to wear and will irritate the eye.
Right eye blurred two weeks after conjunctivitis?