Which of the following conditions can polymethyl methacrylate cause if contact lenses are not removed?

Polymethyl methacrylate (PMMA) is a polymer commonly used in various medical applications, including some types of contact lenses. If contact lenses made from PMMA are not removed, they can cause corneal burns. This condition results from the toxicity and irritative properties of PMMA, especially when combined with the natural moisture of the eye. The material can trap debris and toxic substances against the cornea, leading to irritation and potential burns on the corneal surface.

Additionally, the lack of moisture absorption capabilities in PMMA lenses can lead to dryness and discomfort, further exacerbating the risk of injury to the cornea. Understanding this mechanism highlights the importance of proper care and routine removal of contact lenses to prevent serious ocular complications.