Wiktionary

best form lens

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Noun

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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[1]:
      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.
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