What is the principle behind contact lens fitting?

The principle behind contact lens fitting primarily focuses on ensuring comfort, adequate vision correction, and maintaining proper eye health. When fitting contact lenses, several critical aspects are taken into account.

First, comfort is essential because improperly fitted lenses can lead to discomfort, irritation, or even serious eye health issues. A successful fitting requires an understanding of the curvature of the cornea, the size of the eye, and the individual's unique ocular characteristics.

Second, adequate vision correction must be achieved. Different individuals have varying prescriptions and visual needs, which means that the lenses must accurately correct these vision issues to provide optimal clarity.

Lastly, proper eye health is paramount during the fitting process. Contact lenses sit directly on the surface of the eye, so ensuring that the chosen lenses promote healthy tear film, oxygen permeability, and do not cause adverse effects on the eye is crucial.

In contrast, while factors such as fashion or aesthetic appeal might be considerations for some patients, they are not the primary principles guiding contact lens fitting. Minimizing costs is also important but not the core focus when determining the suitability of contact lenses for a patient. Therefore, the correct answer encompasses the fundamental concerns that contact lens fittings aim to address.