Which factor can lead to discomfort associated with rigid gas permeable lenses?

Improper fitting is a crucial factor that can lead to discomfort associated with rigid gas permeable (RGP) lenses. When RGP lenses are not fitted correctly, they may not align well with the curvature of the cornea, resulting in areas of excessive pressure or insufficient movement on the eye's surface. This misalignment can cause discomfort, irritation, or even more serious complications such as corneal abrasion or hypoxia.

An appropriate lens fit allows for optimal movement, ensuring that the lens can seep in and out of tears and avoid excessive tightness or looseness. By fitting the lens correctly, practitioners can help ensure that the lens is comfortable throughout wear, which is particularly important given the rigid nature of these lenses compared to soft lenses. Overall, achieving the right fit is essential for maintaining ocular health and comfort when wearing RGP lenses.