When evaluating contact lenses, what is a characteristic of a tight-fitting lens?

A tight-fitting contact lens is characterized by corneal staining, which occurs when the lens fits too closely to the cornea and does not allow for adequate tear exchange and movement across the lens surface. This fitting type can create friction between the lens and the cornea, leading to a disruption of the corneal epithelium, which can result in staining visible on fluorescein examination.

When a lens fits tightly, it is less likely to have significant movement during blinking, which might suggest minimal interaction with the eyelids, opposing the idea of greater movement. Comfortable wear is generally associated with a proper fit, where the lens provides adequate cushioning and allows for natural blinking without discomfort. Increased ocular health risks can be a consequence of various fitting issues, but corneal staining specifically indicates an improper fit that poses immediate concerns for corneal health through direct damage.