By American Academy of Ophthalmology, M. Bowes Hamill MD
Significant revision for 2014-2015!
Covers the technology of refractive surgical procedure, accommodative and nonaccommodative remedy of presbyopia, and sufferer review. Examines particular approaches in refractive surgical procedure and their capability problems, in addition to refractive surgical procedure in ocular and systemic ailment. This year's significant revision positive aspects new photos and up-to-date info on lens implants utilized in the USA and different countries.
Upon of completion of part thirteen, readers might be capable to:
Identify the final kinds of lasers utilized in refractive surgeries
Explain the stairs together with scientific and social background, ocular exam and ancillary checking out in comparing even if a sufferer is a suitable candidate for refractive surgery
For incisional keratorefractive surgical procedure, describe the background, sufferer choice, surgical recommendations, results, and complications
Explain contemporary advancements within the software of wavefront expertise to floor ablation and LASIK
Describe the different sorts of IOLs used for refractive correction
Read or Download 2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery PDF
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Extra info for 2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery
2008;115(7): 1249-1261. Schallhorn SC, Tanzer DJ, Kaupp SE, Brown M, Malady SE. Comparison of night driving performance after wavefront-guided and conventional LASIK for moderate myopia. Ophthalmology. 2009;116(4):702-709. Stonecipher KG, Kezirian GM. Wavefront-optimized versus wavefront-guided LASIK for myopic astigmatism with the ALLEGRETTO WAVE: three-month results of a prospective FDA trial. J Refract Surg. 2008;24( 4):S424-S430. Corneal Wound Healing All forms of keratorefractive surgery are exquisitely dependent on corneal wound healing to achieve the desired results.
These indices also fail to describe the true shape and power of the peripheral cornea. Topographic maps displaying axial power and curvature provide an intuitive sense of the physiologic flattening of the cornea but do not represent the true refractive power or the true curvature of peripheral regions of the cornea (Fig 1-9). Instantaneous power and curvature A second method of describing the corneal curvature on Placido disk-based topography is the instantaneous radius of curvature (also called meridional or tangential power).
Corneal Effects of Keratorefractive Surgery All keratorefractive procedures induce refractive changes by altering corneal curvature; however, the method by which the alteration is accomplished varies by procedure and by the refractive error being treated. Treatment of myopia requires a flattening, or decrease, in central corneal curvature, whereas treatment ofhyperopia requires a steepening, or increase, in central corneal curvature. Corneal refractive procedures can be performed using a variety of techniques, including incisional, tissue addition or subtraction, alloplastic material addition, collagen shrinkage, and laser ablation (see the section Laser Biophysics for discussion oflaser ablation).