What is the typical diameter of the corneal cap?

The typical diameter of the corneal cap is around 7 to 9 mm. The corneal cap refers to the central portion of the cornea that is often involved in various contact lens fitting techniques and corneal surgeries, such as cross-linking or keratoplasty. This measurement is essential for practitioners to understand, as it greatly influences contact lens fitting, ensuring that the lenses align properly with the patient's corneal surface to achieve comfort and optimal vision.

While other choices may present numbers within a range that could theoretically apply to certain clinical situations, the accepted and standard measurement for the corneal cap in practice falls within the 7-9 mm range. Understanding the correct measurements will aid in providing better patient care and effective fitting of contact lenses.