What could be a potential consequence of wearing a tight GP lens?

Wearing a tight gas permeable (GP) lens can lead to less oxygen reaching the cornea. The cornea relies on a constant supply of oxygen from the air as it does not have its own blood supply. When a GP lens fits too tightly, it can restrict the flow of tears beneath the lens, limiting the amount of oxygen that can diffuse through to the cornea. This hypoxia can cause various issues, including corneal swelling, discomfort, and potentially long-term damage to the corneal tissue if not addressed.

In contrast, increased comfort, enhanced vision, and no effect on vision are not outcomes typically associated with a tight-fitting GP lens. While a well-fitting GP lens can enhance vision due to its stability and optical clarity, a tight lens may lead to discomfort and vision problems instead. Therefore, understanding the importance of proper lens fit is crucial for maintaining corneal health and achieving optimal visual acuity.