## Ophthalmic Mechanics for the Refractionist, Volume 1 |

### From inside the book

Results 1-3 of 11

Page 77

placed about 14

convergent and these then enter the eye. If the principal focus of the ophthalmic

lens placed 14

eye, then the ...

placed about 14

**millimeters**before the eye, parallel rays are renderedconvergent and these then enter the eye. If the principal focus of the ophthalmic

lens placed 14

**millimeters**in front of the eye coincides with the far point of theeye, then the ...

Page 142

Since practically always the measurements are given in

may be written 2 ((i-l) (1000) Where S and d are in

Various Points on Plus and Minus Lenses I. Given: A plus 4Dlens_ which is 3^1 ...

Since practically always the measurements are given in

**millimeters**, the equationmay be written 2 ((i-l) (1000) Where S and d are in

**millimeters**. Thicknesses atVarious Points on Plus and Minus Lenses I. Given: A plus 4Dlens_ which is 3^1 ...

Page 146

Given: A blank of 60

The blank is decentered 2

the blank. Find: (a) The lens thickness at the O.C. (b) The lens thickness at the ...

Given: A blank of 60

**millimeters**of +4.00 D and an index of refraction of 1.500.The blank is decentered 2

**millimeters**and a lens. 44**millimeters**round is cut fromthe blank. Find: (a) The lens thickness at the O.C. (b) The lens thickness at the ...

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### Contents

Chapter Page | 1 |

Spherical Lenses | 10 |

Cylindrical Lenses | 24 |

Copyright | |

12 other sections not shown

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### Common terms and phrases

180th meridian American 0ptical American Optical Aphakia astigmatism axis B.F. toric form back surface base curve Bausch & Lomb Calculate center thickness Check concave convex corneal vertex Courtesy cross cylinder form crown glass cyl form cylindrical lenses decentration degree of prism diagram diameter direction effective power Flint focal length following Rx frames Front or Toric front surface Ful-Vue fused bifocal Given grinding hyperopia inches index of refraction lens blank lens containing lens measure lens thickness lensometer meniscus meter millimeters minimum edge thickness minus cylinder form minus lens Minus Surface motion myopia neutralizing chart Numont optical center optical glass parallel rays plano polished power wheel Presbyopia prescription principal meridians prism B. I. prism diopter prismatic effects prismatic power pupillary distance rays of light refraction is 1.500 refractionist refractive error side sphere spherical lenses temple Thick Edge Transpose into B.F. unknown lens x i x