When evaluating soft lens fit, what could indicate a need for a larger diameter lens?

In the context of evaluating the fit of soft contact lenses, excessive edge lift is a significant indicator that a larger diameter lens may be necessary. When there is excessive edge lift, it can mean that the lens is not adequately positioned on the cornea and is lifting too much away from the eye at the edges. This often reduces the stability of the lens, leading to fluctuations in vision and potential discomfort during wear.

A larger diameter lens can help achieve better alignment with the cornea, leading to improved centration and reduced edge lift. This can enhance the comfort and overall fit of the lens since a properly sized lens should ideally sit evenly on the eye without excessive movement or discomfort. Therefore, taking into account edge lift as a factor in lens fitting can assist in providing patients with a more satisfactory wearing experience.