A warped lens will show how many base curves on the radiuscope and what type of power on the lensometer?

A warped lens, when assessed with a radiuscope, will typically display two base curves because the warping creates irregularities in the lens shape. The radiuscope measures the curvature of the lens, and a warped lens reflects variations in curvature that can result in two distinct measurements.

When using a lensometer on a warped lens, it usually exhibits spherical power rather than sphero-cylindrical power. Spherical power indicates that the lens has a uniform curvature across the entirety of its surface, which may appear due to the overall effect of the warp rather than the distinct correction of astigmatism typically identified with a sphero-cylindrical measurement.

In summary, when a lens shows two base curves, it indicates irregular shapes due to warping, while the manifestation of spherical power suggests a simpler, more uniform characteristic despite the irregularities. Thus, the combination of two base curves and spherical power accurately describes the characteristics of a warped lens as assessed by both tools.