Be sure to use a lint-free towel to pat them dry before handling your contact lenses.
Keep your contact lenses out of the water. When showering or going swimming, take your glasses off.
Avoid cleaning your lenses with saline solution and rewetting drops
The contact lens case should be changed after it expires. These can be an infectious source. Never use lens cases with damage.
Never re-use old contact lens solution.
When your eyelids are closed, less oxygen reaches your tears than when they are open. So, remove the lenses before turning in for the night.
When going outside, wear sunglasses that completely block UV rays. Even a cap is OK. Your eyes become light-sensitive when wearing contacts.
Using someone else's contact lenses might transfer eye diseases or other foreign objects to your eyes.