To verify rigid contact lens power, most laboratories use:

The verification of rigid contact lens power is typically accomplished using a radiuscope because this instrument is designed specifically for measuring the curvature of the lens surfaces. The radiuscope evaluates the back curvature of the lens, which is critical since it directly affects how the lens will sit on the eye and its optical performance.

While there are other methods for determining lens power, such as vertex methods, the radiuscope provides a direct measurement of the lens surface curves, allowing for precise verification of the lens power. In contrast, the back vertex method and the front vertex method involve calculations based on the lens's curvature but do not measure the surfaces directly. An ophthalmoscope is primarily used for examining the interior of the eye and is not suitable for measuring contact lens parameters. Thus, the radiuscope is the most appropriate choice for this specific task.