Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by general context]
6. lenses (object genre)

Anotations

Scope note:

Plastic or glass elements used to change the direction of light by bending or refracting the rays in a specified pattern over an area, achieved by covering the surface of the lens with prisms that are arranged in a pattern designed to achieve the desired effect.