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 evaluate. Examines particular techniques in refractive surgical procedure and their power issues, in addition to refractive surgical procedure in ocular and systemic ailment. This year's significant revision good points new photos and up-to-date info on lens implants utilized in the us and different countries.
Upon final touch of part thirteen, readers will be capable to:
Identify the overall sorts of lasers utilized in refractive surgeries
Explain the stairs together with scientific and social heritage, 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 heritage, sufferer choice, surgical ideas, 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
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Extra resources for 2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery
The same incision has greater effect in older patients than it does in younger patients. IOP and preoperative corneal curvature are not significant predictors of effect. Tissue Addition or Subtraction Techniques With the exception oflaser ablation techniques (discussed in the section Laser Biophysics), lamellar procedures that alter corneal shape through tissue addition or subtraction are primarily of historical interest only. Keratomileusis for myopia was originated by Barraquer as "carving" of the anterior surface of the cornea.
Certain occupations require that best vision be at a specific distance. For example, a minister may desire that best uncorrected vision be at arm's length, so that reading can be done at the pulpit without glasses. Military personnel, firefighters, or police may have restrictions on minimum UDVA and CDVA and on the type of refractive surgery allowed. Knowledge of a patient's recreational activities may help guide the surgeon to the most appropriate refractive procedure or determine whether that patient is even a good candidate for refractive surgery.
The femtosecond laser is approved by the US Food and Drug Administration (FDA) for creating corneal flaps for LASIK and may also be used to create channels for 7 p CHAPTER 1: The Science of Refractive Surgery • 29 intrastromal ring segments and for lamellar keratoplasty and PKP. It uses a 1053-nm infrared beam that causes photodisruption, a process by which tissue is transformed into plasma, and the subsequent high pressure and temperature generated lead to rapid tissue expansion and formation of microscopic cavities within the corneal stroma.
2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery by American Academy of Ophthalmology, M. Bowes Hamill MD