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Completely revised and updated, you will benefit from new and rewritten sections on: axial magnification; Jackson Cross Cylinder tests; retinoscopy; reflex motions; field of view; the optics of indirect ophthalmoscopy; optical aberrations; diffractive lenses; the Doppler shift lasers and the similarities and differences of Gaussian laser beams versus the propagation of light from a point source plus, a new appendix on angles and basic trigonometry. Although not a matrix optics text, matrices are used extensively in the chapters on spherical systems and off-axis aspects of astigmatism. In particular, the matrix treatment of astigmatism serves as a foundation for the recently developed, much improved statistical techniques that deal with refractive corrections and astigmatism in all its aspects.
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