Ophthalmic Mechanics for the Refractionist, Volume 1Southern College of Optometry, 1948 - Eyeglasses |
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Page 12
George Joseph Haus. 4. Meniscus ( little moon ) Crescent shaped , or periscopic ( to view or all sides ) Convex lenses are lenses which have one convex surface and one concave surface . In the meniscus or periscopic convex lens , the ...
George Joseph Haus. 4. Meniscus ( little moon ) Crescent shaped , or periscopic ( to view or all sides ) Convex lenses are lenses which have one convex surface and one concave surface . In the meniscus or periscopic convex lens , the ...
Page 13
... Meniscus lenses are lenses having a deeper periscopic form . The usual base curve is either +6.00 or -6.00 . +6.00 -9.00 で Fig . 16 +8.50 -6.00 Both periscopic and meniscus forms are called bent lenses . The other forms are called ...
... Meniscus lenses are lenses having a deeper periscopic form . The usual base curve is either +6.00 or -6.00 . +6.00 -9.00 で Fig . 16 +8.50 -6.00 Both periscopic and meniscus forms are called bent lenses . The other forms are called ...
Page 20
... Meniscus And each of the following lenses has a nominal power of -3.00 diopters -1.50 1.50 -1.00 +6.00 -2.00 Plano -3.00 -9.00 ༠༠༩༠ “ ” ( ” 073.00 Double Concave . Biconcave Plano - concave Meniscus Fig . 25 The Lens - Maker's Equation ...
... Meniscus And each of the following lenses has a nominal power of -3.00 diopters -1.50 1.50 -1.00 +6.00 -2.00 Plano -3.00 -9.00 ༠༠༩༠ “ ” ( ” 073.00 Double Concave . Biconcave Plano - concave Meniscus Fig . 25 The Lens - Maker's Equation ...
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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