Contact lenses are soft plastic discs that are placed over the cornea of the eye. They are worn by those with vision problems as a corrective device, allowing them to see clearly without the need for glasses. While there are new contact lenses that have been designed for extended wear, many lenses need to be removed daily for eye health and safety. Sleeping in lenses that have not been designed with extended wear in mind can lead to dry eyes, blurred vision, sensitivity to light or even keratitis.
