A lens that has a uniform curve on the front surface and optimized curves on the back surface is called what?

A lens characterized by having a uniform curve on the front surface and optimized curves on the back surface is known as an atoric lens. Atoric lenses are designed to correct various types of aberrations by providing different curvatures on the back surface, allowing for improved optical performance, especially for patients with higher degrees of astigmatism. This design helps to enhance visual clarity and comfort in comparison to more traditional lens designs.

In contrast, spherical lenses have a uniform curvature on both surfaces, which is not optimized for varying degrees of astigmatism. Toric lenses have different curvatures along two perpendicular axes, specifically designed to correct astigmatism but are not necessarily optimized on the back surface in the same way atoric lenses are. Aspheric lenses are typically designed with a gradual change in curvature to reduce distortion and better mimic the natural shape of the eye, but they do not specifically have a uniform front surface combined with optimized back surfaces. Thus, the distinct design of atoric lenses allows for targeted corrections that enhance visual quality for patients, making this option the most accurate choice in this context.