Ophthalmic Mechanics for the Refractionist, Volume 1Southern College of Optometry, 1948 - Eyeglasses |
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Page 180
... grinding the surface of a lens . In order to grind a lens to comply with the requirements of a particular prescription , either a rough or semi - finished lens is selected . The selection is made according to a large number of factors ...
... grinding the surface of a lens . In order to grind a lens to comply with the requirements of a particular prescription , either a rough or semi - finished lens is selected . The selection is made according to a large number of factors ...
Page 185
... grinding and they are carried out on the same type hand surfacing machine . The differences of the operations are brought about by the use of finer abra- sives in each case . Rocking is a hand operation em- ployed for the grinding of a ...
... grinding and they are carried out on the same type hand surfacing machine . The differences of the operations are brought about by the use of finer abra- sives in each case . Rocking is a hand operation em- ployed for the grinding of a ...
Page 196
... grinding on my other side . Just got comfortable after being frozen under ice water . Now they are going to toast me again on a hot steam plate so that I can be stuck down on pitch again to grind my back . over me . Holy smoke ! When ...
... grinding on my other side . Just got comfortable after being frozen under ice water . Now they are going to toast me again on a hot steam plate so that I can be stuck down on pitch again to grind my back . over me . Holy smoke ! When ...
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Common terms and phrases
180th meridian American Optical amount of prismatic Aphakia astigmatism axis B.F. toric form Back or Minus back surface base curve Bausch & Lomb Calculate centimeters concave convex cross cylinder form crown glass cyl form cylindrical lenses D₁ D₂ decentration degree of prism deviation diagram direction distance P.D. effective power flat form Flint focal length following Rx frames Front or Toric front surface FUL-VUE fused bifocal Given grinding hyperopia hyperopic inches index of refraction lens measure lens thickness lensometer meniscus meter millimeters minimum edge thickness minus cylinder form minus lens Minus Surface motion myopia Numont optical center optical glass parallel rays plano power wheel Presbyopia prescription principal meridians prism diopter prismatic effects prismatic power pupillary distance rays of light refractionist refractive error refractive power S.V. toric side sphere spherical lenses Surface Fig temple thru the lens Toric Surface Transpose into B.F. unknown lens wave front