Why is it important to consider the base curve when fitting contact lenses?

The base curve of a contact lens is crucial because it directly impacts how well the lens fits the curvature of the wearer's cornea. A proper fit is essential for comfort, as an incorrectly fitting lens can cause discomfort, irritation, or even damage to the eye.

The base curve must be tailored to the individual’s eye shape to ensure that the lens sits correctly; this allows for proper tear exchange under the lens and can enhance the optics of the lens, providing clearer vision. A lens that is too flat or too steep in relation to the eye can lead to shifting or movement of the lens during blinking, which can also affect visual acuity and comfort.

While the power of the lens is important for vision correction, it is primarily the base curve that ensures the lens remains stable and comfortable during wear. The aesthetic appearance of the lenses may be a consideration, but it is secondary to ensuring the ocular health and comfort of the wearer. Thus, understanding and selecting the right base curve is a vital aspect of contact lens fitting.