Which of the following describes the benefit of edge lift in a contact lens?

The benefit of edge lift in a contact lens largely relates to its ability to enhance tear exchange beneath the lens. When a lens has appropriate edge lift, it creates a slight gap between the lens and the cornea. This facilitates the movement of tears under the lens, helping to keep the eye surface hydrated, flush away debris, and provide a cleaner tear film. Improved tear exchange can also promote better overall ocular health, reducing the risk of dryness and irritation that can arise from stagnant tears.

While increased comfort is an important aspect of contact lens design, it is not the primary function of edge lift. Edge lift can contribute to comfort indirectly by ensuring adequate moisture and reducing friction, but it is not solely responsible for comfort. Preventing lens rotation and minimizing the risk of lens dislodgment are more directly related to the overall design and fit of the contact lens rather than specifically a benefit of edge lift. Thus, the primary and most direct benefit of edge lift is its facilitation of better tear exchange.