New PDF release: 2014-2015 Basic and Clinical Science Course (BCSC): Section

By American Academy of Ophthalmology, Hermann D. Schubert MD

ISBN-10: 1615255664

ISBN-13: 9781615255665

Offers an outline of the constitution and serve as of the retina and its courting to the pigment epithelium, choroid and vitreous. Describes the main vitreoretinal issues and acceptable diagnostic tools and therapy principles.

In its final significant revision, part 12 used to be re-organized into 3 components. Separate chapters at the moment are dedicated to age-related macular degeneration, diabetic retinopathy and retinopathy of prematurity, together with the newest imaging ideas and choroidal aspect. chosen healing subject matters contain laser treatment and vitreoretinal surgery.

Upon of completion of part 12, readers can be capable to:

Select applicable tools of exam and ancillary reviews for the prognosis of vitreoretinal disorders
Describe the rules of clinical and surgical operation of vitreoretinal disorders
Incorporate information from significant potential scientific trials within the administration of chosen vitreoretinal issues

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Extra info for 2014-2015 Basic and Clinical Science Course (BCSC): Section 12: Retina and Vitreous

Example text

A variety oflenses are available for viewing the retina with the slit lamp; the type frequently used is the 3-mirror contact lens. Contact lenses offer the advantage of better stereopsis and higher resolution. They require topical corneal anesthesia and are placed directly on the cornea to eliminate its power and the cornea-air interface. Fluids used range from contact lens wetting solutions to viscous clear gel solutions. The more viscous the solution, however, the more it interferes with the quality of any photography or angiography performed shortly after the examination.

In contrast, non-contact lenses use the power of the lens in combination with the cornea to produce an inverted image with a wider field of view. The biconvex indirect lenses used with the slit lamp do not touch the cornea, and thus topical anesthesia is not necessary. In general, high-plus optical 19 F 20 • Retina and Vitreous • power lenses such as a 60 D lens with 1:1 image magnification and 78 and 90 D lenses are used. Lenses with lower dioptric power offer more axial resolution and better stereopsis.

Modified from Marmor MF, Zrenner E, Standard for clinical electroretinographv /1994 update]. Figure 3-1 Doc Ophthalmol. ) 3. oscillatory potentials (dark-adapted) 4. single-flash "cone response" (photopic; light-adapted) 5. 30-Hz flicker responses (light-adapted) In general, the ERG is characterized by a negative waveform (a-wave) that represents the response of the photoreceptors, followed by a positive waveform (b-wave) generated by a combination of cells in the Muller/bipolar cell layer. The entire response usually lasts less than 150 milliseconds.

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2014-2015 Basic and Clinical Science Course (BCSC): Section 12: Retina and Vitreous by American Academy of Ophthalmology, Hermann D. Schubert MD

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