Risks from the contact lenses use
People who wear contact lenses are at an increased risk of corneal ulcers. The risk of corneal ulcerations increases tenfold when using extended-wear soft contact lenses. Extended-wear contact lenses refer to those contact lenses that are worn for several days without removing them at night. Contact lenses may damage your cornea in many ways:
Scratches on the edge of your contact lens can scrape the cornea's surface and make it more vulnerable to bacterial infections.
Similarly, tiny particles of dirt trapped underneath the contact lens can scratch the cornea.
Bacteria may be on the improperly cleaned lens and get trapped on the under surface of the lens. If your lenses are left in your eyes for long periods of time, these bacteria can multiply and cause damage to the cornea.
Wearing lenses for extended periods of time can also block oxygen to the cornea, making it more susceptible to infections.