Download 2014-2015 Basic and Clinical Science Course (BCSC): Section by American Academy of Ophthalmology, Dimitri T. Azar MD PDF

By American Academy of Ophthalmology, Dimitri T. Azar MD

ISBN-10: 1615255575

ISBN-13: 9781615255573

Part three has been thoroughly reorganized for less complicated use! you will find extra real-life scientific examples, many new figures and new studying workouts to assist gauge your knowing of the fabric. part three presents a accomplished review of scientific optics, together with present purposes of optical phenomena corresponding to lasers, spectacles, IOLs and refractive surgical procedure. offers optics of the human eye; simple strategies of geometric optics; ophthalmic tools and phone lenses. imaginative and prescient rehabilitation is usually discussed.

Upon of entirety of part three, readers could be capable to:

Outline the foundations of sunshine propagation and picture formation and paintings via a few of the primary equations that describe or degree such houses as refraction, mirrored image, magnification and vergence
Define a few of the varieties of visible notion and serve as, together with visible acuity, brightness sensitivity, colour belief and distinction sensitivity
Explain the optical ideas underlying quite a few modalities of refractive correction: spectacles, touch lenses, intraocular lenses and refractive surgical procedure

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Additional resources for 2014-2015 Basic and Clinical Science Course (BCSC): Section 3: Clinical Optics

Sample text

50 cm----1 ,Edmond H. Thall, MD.! The first image becomes the object for the second lens. Because the first image is to the right of Pi, it is a virtual object for the second lens. 40 m. 00D = 10cm The final image is 10 cm to the 1ight of Pi' and therefore real. Jn this case, you cannot 0bserve the intermediate virtual image, but the final real image can be observed on a screen placed l Ocm behind the second lens. lyze ystems of multiple lenses. Simply apply the LME to each lens iu a serial fashion.

Most optical systems have one particular object location that yields a magnification of 1. In other words, when an object is located in the correct position, the image will be upright and the same size as the object. The principal planes are perpendicular to the optical axis and identify the object and image locations that yield a magnification of 1. The principal planes are also called the planes of unit magnification and are geometric representations of where the bending oflight rays occurs. Consider an optical system consisting of i thin lenses in air (Fig 1-34).

Optical Media and Refractive Index Light travels through a variety of materials, such as air, glass, plastics, liquids, crystals, some biological tissues, the vacuum of space, and even some metals. A medium is any material that transmits light. Light travels at different speeds in different media. Light moves fastest in a vacuum and slower through any material. The refractive index of an optical medium is the ratio of the speed of light in a vacuum to the speed of light in the medium and is usually denoted in mathematical equations by the lowercase letter n.

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