By Kevin M. Miller, MD
Provides present purposes of optical phenomena, together with the optical concerns concerning 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 suggestions of geometrical optics and the present method of low imaginative and prescient administration and imaginative and prescient rehabilitation.
Read Online or Download 2008-2009 Basic and Clinical Science Course: Section 3: Clinical Optics (Basic and Clinical Science Course 2008-2009) PDF
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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)
In therapeutic ophthalmic lasers, coherence, like directionality, is important because it improves focusing characteristics. Polarization Many lasers emit linearly polarized light. Polarization is incorporated in the laser system to allow maximum transmission through the laser medium without loss caused by reflection. The specific polarization of the light beam is not currently used in medical applications. Intensity In most medical applications, the most important property of lasers is intensity.
That is, the speed of light through the material depends on the direction of light propagation through the material. 492 CLINICAL EXAMPLE 2-3 You may notice that red objects appear nearer than blue objects when they are displayed against a black background (Fig 2-18). This effect stands out in slide presentations that are rich in red and blue text and is known as chromostereopsis. 5 0 of chromatic aberration. Even individuals with redgreen color blindness can observe the effect. To bring red print into focus, the eye must accommodate.
FUlldamentals of Visual Science. Springfield, IL: Charles C Thomas; 1969. ) Typical laser wavelengths. Principles and Clinical Applications (Adapted from Steinert of Photodisruption. RF. Puliafito Philadelphia: CA. The Nd:YAG Laser in Oph- Saunders; 1985. Redrawn by Jonathan CHAPTER 2 Geometrical Optics Geometrical optics deals primarily with imaging: how to produce images using light and how to manipulate image features such as size, brightness, and location. As its name implies, geometrical optics can be understood largely in terms of geometrical principles.