By American Academy of Ophthalmology, M. Bowes Hamill MD
Significant revision for 2014-2015!
Covers the technological know-how of refractive surgical procedure, accommodative and nonaccommodative therapy of presbyopia, and sufferer review. Examines particular techniques in refractive surgical procedure and their capability issues, in addition to refractive surgical procedure in ocular and systemic illness. This year's significant revision positive factors new pics and up to date info on lens implants utilized in the us and different countries.
Upon finishing touch of part thirteen, readers may be capable to:
Identify the overall forms 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 an acceptable candidate for refractive surgery
For incisional keratorefractive surgical procedure, describe the historical past, sufferer choice, surgical thoughts, results, and complications
Explain fresh advancements within the program 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
Schmack I, Dawson DG, McCarey BE, Waring GO III, Grossniklaus HE, Edelhauser HF. Cohesive tensile strength of human LASIK wounds with histologic, ultrastructural, and clinical correlations. J Refract Surg. 2005;21 (5):433-445. D r CHAPTER 2 Patient Evaluation A thorough preoperative patient evaluation is crucial for achieving a successful outcome after refractive surgery. It is during this encounter that the physician begins to develop an impression as to whether the patient is a good candidate for refractive surgery.
Although most visual acuity parameters are similar between conventional and customized treatments (including both wavefront-optimized and wavefront-guided treatments), the majority of recent reports demonstrate improved vision quality when customized treatment profiles are used. Outcomes with wavefront-optimized treatments are similar to those of wavefront-guided treatments for most patients, with the exception of patients with substantial preoperative higher-order aberrations. Topography-guided laser ablations Topography-guided lasers are currently investigational in the United States.
Such registration is achieved by using marks at the limbus before obtaining the wavefront patterns or by iris registration, which matches reference points in the natural iris pattern to compensate for cyclotorsion and pupil centroid shift. The wavefront-guided laser then uses a pupil-tracking system, which helps maintain centration during treatment and allows accurate delivery of the customized ablation profile. The results for both wavefront-optimized and wavefront-guided ablations for myopia, hyperopia, and astigmatism are excellent, with well over 90% of eyes achieving 20/40 or better uncorrected distance visual acuity (UDVA; also called uncorrected visual acuity, UCVA).