Excessive wear of Contact Lenses, particularly overnight wear, and poor hygiene is associated with most of the safety concerns. Never ignore any redness, itching, watering if you are wearing Contact Lens and seek advice from the ophthalmologist.
Few complications of Contact Lens are Giant papillary conjunctivitis-allergic, Superior limbic keratoconjunctivitis-dry Eye, Corneal abrasion, Corneal ulcer – keratitis etc. These are not common and can be easily avoided with proper handling and care of your Lenses.