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.
  • - Shell conical or biconvex, without canals in the external layer.
  • Klqvos, ivy), biconvex; xystroidal or sistroidal (Gr.
  • In the first it is a biconvex lens, from which segments are continually cut off parallel to the posterior surface; and in the second an elongated dome, from which segments are cut off by a transverse wall.
 

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