Excessive wear of contact lenses, especially overnight wear, is associated with most of the safety concerns. Problems associated with contact lens wear may affect the eyelid, the conjunctiva, the various layers of the cornea, and may the tear film that covers the surface of the eye.
Complications due to contact lens wear affect aooriximately 4% of contact lens wearers each year.
Studies conducted on side effects from long-term wearing of contact lenses: Long-term contact lens wear appears to decrease the entire corneal thickness and increase the corneal curvature and surface irregularity.
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