best form lens

English

Noun

best form lens (plural best form lenses)

1. (optics) A lens that is designed to minimize spherical aberration.
   • 2003, R. Pitts Crick, A Textbook of Clinical Ophthalmology‎:

     The lens form having the least optical aberrations is called the best form lens. For most powers of spectacle lenses the best for is a meniscus lens.