Corneal Topography: A Guide for Clinical Application in by Ming Wang MD

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By Ming Wang MD

With the fast development of corneal topography and wavefront applied sciences and the elevated program of corneal topography not just in refractive but in addition in top class IOL surgical procedure, a brand new version of the best-selling Corneal Topography: A advisor for scientific program within the Wavefront period may be the most advantageous source for either ophthalmologists and optometrists.

In this moment version, Dr. Ming Wang, Dr. Tracy Swartz and over 50 individuals mix the $64000 themes of refractive and top rate lens surgical procedures and positioned corneal topography within the context of wavefront know-how. With over 500 photos, this version supplies exact cognizance to the newest advances in those technologies.

The cutting-edge technology and alertness of corneal topography for those anterior section surgical procedures is easily represented in Corneal Topography, A consultant for scientific program within the Wavefront period, moment version, making it the newest and so much finished reference of those cutting-edge applied sciences for refractive and for top rate IOL surgery.

Topographic and Wavefront applied sciences lined Include:
• Placido disc-based topographic systems
• Elevation-based topographic systems
• Ultrasound-based topographic systems
• OCT-based topographic systems
• Topography and wavefront mixed systems

Topographic purposes coated Include:
• Topographies of corneal illnesses, together with post-RK/CK/LASIK/PRK
• Topography-guided touch lens fitting
• Topography software in refractive surgical procedure and in top rate IOL surgeries
• Topographic tips for corneal surgeries
• Topography-guided customized treatments
• mixed remedy options utilizing topography and wavefront data
• destiny improvement of corneal topography within the wavefront era

Updated and reorganized to mirror alterations within the know-how, Corneal Topography: A consultant for scientific software within the Wavefront period, moment version is indispensible for all anterior phase surgeons, ophthalmologists, and optometrists.

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Extra info for Corneal Topography: A Guide for Clinical Application in Wavefront Era

Sample text

The irregular astigmatism is more evident using the 24 Chapter 3 auto scale. 4 The allocation of colors on an absolute/standardized scale is related to the distribution of corneal powers in the normal population. Central corneal power has an approximate Gaussian distribution (represented by a bell-shaped curve). 50 D, which is depicted by a color from the middle of the spectrum. Approximately 66% of the population has a central corneal power within one standard deviation of the mean (42 to 45 D), and this is represented by the adjacent colors on the scale.

Unfortunately, this requires the assumption that the center of curvature for the specific surface point is located along the optic axis. This radius is then called the axial radius of curvature. The center for all surface points is on the optic axis for spherical surfaces only, and the cornea is an aspheric surface. While this assumption was acceptable for keratometry, it introduces significant error in the corneal periphery. 8 The axial map gives a global view of the corneal curvature as a whole.

Lebow KA, Grohe RM. Differentiating contact lens induced warpage from true keratoconus using corneal topography. CLAO J. 1999;25(2):114-122. 2. Maguire LJ, Singer DE, Klyce SD. Graphic presentation of computer-analyzed keratoscope photographs. Arch Ophthalmol. 1987;105:223-230. 3. Wilson SE, Klyce SD, Husseini ZM. Standardized color-coded maps for corneal topography. Ophthalmology. 1993;100:1723-1727. 4. Oshike T, Klyce SD. Corneal topography: basic concepts. In: Brightbill FS, ed. Corneal Surgery—Theory, Technique, and Tissue.

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