2014-2015 Basic and Clinical Science Course (BCSC): Section by American Academy of Ophthalmology, M. Bowes Hamill MD PDF
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 remedy of presbyopia, and sufferer assessment. Examines particular approaches in refractive surgical procedure and their capability problems, in addition to refractive surgical procedure in ocular and systemic disorder. This year's significant revision beneficial properties new portraits and up to date info on lens implants utilized in the U.S. and different countries.
Upon crowning glory of part thirteen, readers will be capable to:
Identify the final kinds of lasers utilized in refractive surgeries
Explain the stairs together with scientific and social historical past, ocular exam and ancillary trying out in comparing no matter if a sufferer is a suitable candidate for refractive surgery
For incisional keratorefractive surgical procedure, describe the heritage, sufferer choice, surgical innovations, results, and complications
Explain fresh advancements within the software of wavefront know-how to floor ablation and LASIK
Describe the differing kinds of IOLs used for refractive correction
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Extra info for 2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery
In addition to having high energy per photon, light at this end of the electromagnetic spectrum has very low tissue penetrance and thus is suitable for operating on the surface of tissue. This laser energy is capable of great precision, with little thermal spread in tissue; moreover, its lack of penetrance or lethality to cells makes the 193-nm laser nonmutagenic, enhancing its safety. ) Solid-state lasers have been designed to generate wavelengths of light near 193 nm without the need to use toxic gas, but the technical difficulties in manufacturing these lasers have limited their clinical use.
Courtesv of J. ) superior corneal curvature measurements at a defined set of 5 points above and below the horizontal meridian. 2 D, and skewed radial axes are all suggestive of corneal ectatic disorders, but there is some overlap between normal and abnormal eyes. In addition to these topographic metrics, substantial displacement of the thinnest area of the cornea from the center as revealed by corneal tomography is also suggestive of KC. Normal corneas are substantially thicker peripherally than centrally (by approximately 50-60 µm), and corneas that are not thicker peripherally suggest an ectatic disorder.
This line may not necessarily be the patient's line of sight or the visual axis, which may lead to confusion in interpreting topographic maps. For a more extensive discussion of other uses of computerized corneal topography, refer to BCSC Section 3, Clinical Optics, and Section 8, External Disease and Cornea. Generally, data from the reflection of the mires from the topographic instruments are presented not only numerically but-more important for clinical evaluation-also as an image, with corneal curvature typically represented utilizing axial and tangential methods.
2014-2015 Basic and Clinical Science Course (BCSC): Section 13: Refractive Surgery by American Academy of Ophthalmology, M. Bowes Hamill MD