2008-2009 Basic and Clinical Science Course: Section 3: by Kevin M. Miller, MD

By Kevin M. Miller, MD

Provides present purposes of optical phenomena, together with the optical issues with regards to foundations of lasers, spectacles, IOLs, and refractive surgical procedure and the layout, becoming, and problems of touch lenses. additionally coated are optics of the human eye, the layout and use of ophthalmic tools, easy recommendations of geometrical optics and the present method of low imaginative and prescient administration and imaginative and prescient rehabilitation.

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Additional resources for 2008-2009 Basic and Clinical Science Course: Section 3: Clinical Optics (Basic and Clinical Science Course 2008-2009)

Sample text

Object and image distances are negative when they point to the left and positive when they point to the right (see Fig 2-9). Quick Review of Angles, Trigonometry, and the Pythagorean Theorem It is fuseful to review a few basic principles of geometry and trigonometry. A circle can be divided angularly into 3600 or 211:radians. 28 radians. It is frequently necessary to convert back and forth between degrees and radians when solving optics problems. A degree can be subdivided into 60' (minutes); each minute can be subdivided into 60" (seconds).

Light in a homogeneous medium propagates along straight line paths originating from a point source. A ray is a geometrical construct that represents a light path. Notice that rays traversing an aperture continue along a straight line. (Illustration developed by Edmond H. Thall, MO, and Kevin M. Miller. MO, and rendered by C. H. ) Smooth optical interface Figure 2-20 Light striking a smooth optical interface is specularly reflected and specularly transmitted. (Illustration MO, developed and Kevin M.

H. 5-mm Image plane aperture l ---- 1 mm T --- l 1 mm T I.. 50cm A 50cm ~I 2-16 A, A smaller pinhole restricts light from a single object point to a smaller spot in the image. B, Object points can be closer together before their images overlap, and thus the image contains more detail. This analysis ignores diffraction Figure effects. IIIlustration developed by Kevin M. Miller, MD. and rendered by C. H. Wooley) . B - ---- 38 . Clinical Optics image of each object point. Theoretically, if a perfect point image could be produced for every point of an object, the image would be an exact duplicate of the object.

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