Sentence Examples


  • - Biconcave, biconvex and concavo-convex (meniscus) lenses are employed in ophthalmic practice in the treatment of errors of refraction.
  • The rays emitted from an axial object-point are not combined into one image-point by an ordinary biconvex lens of fixed aperture, but the central rays come to a more distant focus than the outer rays.
  • Klqvos, ivy), biconvex; xystroidal or sistroidal (Gr.
 
 

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