By Kevin M. Miller, MD

ISBN-10: 1560558768

ISBN-13: 9781560558767

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

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

Sample text

Axis. The essential property of the nodal points is that these 2 angles are equal for any choice of object point. Because of this property, the nodal points are useful for establishing a relationship among transverse magnification, object distance, and image distance. ) No matter where an object is located, both the object and the image subtend equal angles with respect to their nodal points. Therefore, the 2 triangles in Figure 2-9 are similar, and the lengths of corresponding sides of similar triangles are proportional.

Illustration developed by Edmond H. Thall. MD. and Kevin M Miller. MO, and rendered by C. H. ) CHAPTER 2: Geometrical Optics. 31 To calculate transverse magnification, any off-axis object point and its conjugate image point may be used. Object and image heights are measured perpendicularly from the optical axis. By convention, object or image height is considered positive when the point is above the optical axis and negative when the point is below the axis. In general usage, magnification means enlargement; however, in optics the term magnification refers to making images larger or smaller than the object.

In the past, often the only way to make a practical mirror was to use internally reflecting prisms. Today, TIR is still used in prisms found in binoculars, slit lamps, and operating microscopes, to give just a few examples. 000, refractive indices are not fixed values. They vary as a function of wavelength. In general, refractive CLINICAL EXAMPLE 2-6 TIR makes it impossible to view the eye's anterior chamber angle without the use of a contact lens. Light from the angle undergoes TIR at the air-cornea interface (Fig 2-28A).

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

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