By Neal H. Atebara, MD
Discusses present functions of optical phenomena, together with the optical foundations of lasers, spectacles, IOLs and refractive surgical procedure. offers optics of the human eye; uncomplicated thoughts of geometric optics; ophthalmic tools and get in touch with lenses. Discusses imaginative and prescient rehabilitation from the epidemiology of imaginative and prescient impairment, type of visible functionality deficits, sufferer overview and coffee imaginative and prescient administration. final significant revision 2009 2010.
Read or Download 2011-2012 Basic and Clinical Science Course, Section 3: Clinical Optics (Basic & Clinical Science Course) PDF
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Extra resources for 2011-2012 Basic and Clinical Science Course, Section 3: Clinical Optics (Basic & Clinical Science Course)
Pinhole imaging has been known for millennia, but pinhole images are usuall y too fai nt to be useful. Only in rare situations is pinhole imaging practical. For instance, a solar eclipse can be safely observed when a pinhole is used to image the su n on a piece of paper. Of course, one should not look through the pinhole to directly view the sun! Now what happens if we punch several pinho les in aluminum foi l, separated by a few inches, and repeat th e pinhole-imaging experiment? Several complete images of the flame CLINICAL EXAMPLE 2-' The concept of con jug ate points is illustrated by retinoscopy.
The angle of transmission is preferred in this text because the angle of refraction might otherwise be confused with the angle of reflection e, e,. _ - - - ----- --- ----------_. Reflected ray Figure 2-20 The law of ref lection. Note that the optica l interface is vertica l instead of horizonta l. The surface normal, in cident ray, and ref lected ray all li e in t he sa me plane (in this case the plane of the pape r). The ang le of incidence equa ls the angle of ref lect ion. (Illustration developed by Edmond H.
Rubin ML, Walls GL. FUlldamelltals a/Visual Sciellce. Springfield, IL: Charles C Thomas; 1969. CHAPTER 2 Geometric Optics Geometric optics is the study of light and images using geometric principles. In contrast, physical optics emphasizes the wave nat ure of light, and quantum optics (not covered in this text) emphasizes the particle nature of light and the interaction of light and matter. Geometric optics uses linear rays to represent the paths traveled by light. Pinhole Imaging The simplest imagi ng device is a pinhole ape rture.