When inspecting for a warped lens, what tool is used to identify the base curves?

The correct tool for identifying the base curves of a warped lens is the radioscope. A radioscope is designed to measure the curvature of lens surfaces and can effectively identify any distortions or warps in the lens shape. This information is vital for opticians and optical technicians to determine whether a lens is suitable for wear or if it needs replacing, as warped lenses can significantly affect vision clarity and comfort.

While a lensometer is an essential tool used to determine the prescription of eyeglass lenses by measuring their optical power, it does not specifically assess the curvature or warping of the lens. A keratometer is primarily used to measure the curvature of the cornea rather than lenses, making it less relevant in this context. A profile analyzer also measures curvature but is more commonly used to analyze the profile of a surface rather than specifically identifying base curves. Therefore, the radioscope is the most appropriate and effective tool for inspecting and identifying any warping in lens base curves.