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

By American Academy of Ophthalmology, Dimitri T. Azar MD

Part three has been thoroughly reorganized for simpler use! you can find extra real-life scientific examples, many new figures and new studying routines to aid gauge your knowing of the fabric. part three presents a entire assessment of medical optics, together with present functions of optical phenomena reminiscent of lasers, spectacles, IOLs and refractive surgical procedure. provides optics of the human eye; uncomplicated recommendations of geometric optics; ophthalmic tools and call lenses. imaginative and prescient rehabilitation is additionally discussed.

Upon final touch of part three, readers may be capable to:

Outline the foundations of sunshine propagation and snapshot formation and paintings via the various basic equations that describe or degree such homes as refraction, mirrored image, magnification and vergence
Define a few of the forms of visible notion and serve as, together with visible acuity, brightness sensitivity, colour conception and distinction sensitivity
Explain the optical ideas underlying a number of modalities of refractive correction: spectacles, touch lenses, intraocular lenses and refractive surgical procedure

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

Example text

Where is the image? 1. The image is 20 cm to the right of point P'. 2. 5 cm to the right of point P'. 3. The image is 25 cm to the right of point P'. 4. The image is 33 cm to the right of point P'. 5. 00 m to the right of point P'. 6. This situation does not seem to make sense. If light starts at the object and moves to the right, how does it ever reach the lens? Putting that rather important question aside for the moment, apply the LME: ·? :? :? :? 20m Although this situation seems unrealistic, it does have practical value, as discussed later.

F/lustration developed by Kevin M. Miller, MD, and rendered by C. H. -·- - - -- - - - -- -- -- - - -- - - 36 • Clinical Optics point is the image of the anterior principal point, and the same relationship holds for the nodal points. The focal points, however, are not conjugate. Two pairs of cardinal points are associated with planes: the focal pofnts and the principal points, but there is no such thing as a nodal plane associated with a nodal point. 1. 2. 3. 4. 5. 6. 00 D lens. Where is the image?

Objects in the anterior focal plane image at plus infinity; objects at minus infinity image in the posterior focal plane. S vi. image change. 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.

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