What does the concept of corneal curvature refer to in contact lens fitting?

The concept of corneal curvature in contact lens fitting is fundamentally about the measurement of the cornea's shape. Understanding the curvature of the cornea is essential for selecting the appropriate contact lens because it directly influences how the lens will sit on the eye and how well it will correct vision. The cornea is a dome-shaped surface, and its curvature affects the overall refractive power of the eye.

When fitting contact lenses, technicians take precise measurements of the corneal curvature to ensure that the lenses align correctly with the cornea, providing optimal comfort and vision correction. If the curvature is not accurately measured, lenses may not fit properly, resulting in discomfort, poor vision, or complications for the wearer.

In contrast, while lens thickness, pupil size, and visual acuity are important factors in the overall assessment and fitting process, they do not directly pertain to the shape of the cornea itself. Hence, focusing on corneal curvature is critical for successful contact lens fitting.