What instrument is used to determine the base curve of a rigid contact?

The radiuscope is specifically designed to measure the curvature of the surface of rigid contact lenses. It uses a series of calibrated lenses to determine the radius of curvature, which is critical in fitting contact lenses appropriately to the patient's eye. The correct fitting of the base curve is essential for ensuring comfort, proper movement on the eye, and optimal vision correction.

This instrument provides an accurate assessment of the lens's curvature, allowing practitioners to match the lens to the patient's corneal curvature. Understanding the base curve helps in achieving ideal lens-to-eye alignment, which is crucial for the functionality and comfort of the contact lenses. Without this precise measurement, it would be challenging to provide a suitable lens option for patients, potentially leading to discomfort or poor vision outcomes.