What is the primary indication of a steep fitting contact lens?

The primary indication of a steep fitting contact lens is high apical vaulting. A steep fitting contact lens has a curvature that is tighter than the natural curve of the cornea, resulting in the lens vaulting over the apex of the cornea. This can be necessary for patients with corneas that have a higher than average curvature or those who may have irregular corneal topography. The purpose of achieving a high apical vault is to ensure that there is adequate space between the lens and the cornea, which helps to prevent contact and irritation to the corneal surface while ensuring proper tear exchange beneath the lens.

In cases of high apical vault, this fitting can provide better alignment and comfort for the patient, allowing for stable lens positioning. This is particularly relevant for patients with keratoconus or other corneal abnormalities where maintaining adequate vault and avoiding contact with the corneal apex is crucial for comfort and health.

Other options present conditions that may relate to contact lens wear but do not serve as the primary reason for choosing a steep fitting lens. Blurred vision may result from inappropriate lens fit, but it is not a direct indication for a steep design. Excessive comfort is subjective and may not directly correlate with the steepness of the lens fitting