What is the outer portion of a lenticular lens that does not provide optical use called?

The outer portion of a lenticular lens that does not provide optical use is referred to as the carrier. In the context of lenticular lenses, which are designed to correct vision for conditions such as high myopia or hyperopia with a reduced weight and thickness, the carrier serves as the structural base of the lens.

This non-optical part provides stability and support to the lens, allowing it to be fitted into a frame while maintaining comfort for the wearer. The carrier itself does not contribute to the refractive power or vision correction aspects of the lens, as those functions are fulfilled by the lens's optical section.

Understanding the role of the carrier is essential for opticians when discussing the properties of lenticular lenses and ensuring that patients receive appropriate frames that can accommodate these specialized lenses. The other terms listed refer to different components or features related to lenses, but they do not encompass the outer non-optical area of a lenticular lens like the carrier does.