Modern Ophthalmic OpticsThis book is a comprehensive account of the most recent developments in modern ophthalmic optics. It makes use of the powerful matrix formalism to describe curvature and power, providing a unified view of the optical and geometrical properties of lenses. This unified approach is applicable to the design and properties of not only spectacle lenses, but also contact and intraocular lenses (IOL). The newest developments in lens design, manufacturing and testing are discussed, with an emphasis on the description of free-form technology, which has surpassed traditional manufacturing methods and allows digital lenses to be specifically designed with the unique requirements of the user. Other important topics which are covered include modern lens materials, up-to-date lens measuring techniques, contact and intraocular lenses, progressive power lenses, low vision aids, ocular protection and coatings. Providing a broad overview of recent developments in the field, it is ideal for researchers, manufacturers and practitioners involved in ophthalmic optics. |
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Contents
Surfaces in Ophthalmic Lenses | 21 |
Wavefronts and Rays | 62 |
Single Vision Lenses | 80 |
The LensEye System | 123 |
Aberrations and Lens Design | 205 |
Optics of Contact and Intraocular Lenses | 236 |
Multifocal Lenses | 255 |
Low Vision Aids and High Power Lenses | 329 |
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Common terms and phrases
aberrations angle aniseikonia approximation asphericity back surface back vertex power base curve beam bifocal center thickness coating coefficients compensation components compute conicoid contact lens coordinates cornea cylinder defined direction distance entrance pupil equation example exit pupil eye deviation field of view focimeter front surface function geometry given glass Hessian matrix incident layer lens design lens power lens surface lensmeter located low vision magnification main curvatures main meridians material measured object oblique astigmatism ophthalmic lenses optical axis optical center optical system parameters paraxial paraxial approximation perpendicular plane polynomials position power matrix prescription prism prismatic effect progressive lenses progressive surface propagation radiation radius ray tracing refractive error refractive index refractive power region retina revolution symmetry segment shown in Figure spectacle frame sphere tangent telescope thin lens toric surface transmittance umbilical line vector vergence vertical wavefront wavelength Zernike