By Ming Wang MD
In this moment variation, Dr. Ming Wang, Dr. Tracy Swartz and over 50 participants mix the real issues of refractive and top rate lens surgical procedures and positioned corneal topography within the context of wavefront expertise. With over 500 photos, this variation offers particular consciousness to the newest advances in those technologies.
The cutting-edge technological know-how and alertness of corneal topography for those anterior phase surgical procedures is definitely represented in Corneal Topography, A advisor for medical program within the Wavefront period, moment variation, making it the newest and such a lot complete reference of those state of the art applied sciences for refractive and for top class IOL surgery.
Topographic and Wavefront applied sciences coated 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 ailments, 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 suggestions for corneal surgeries
• Topography-guided customized treatments
• mixed remedy concepts 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 variation is indispensible for all anterior section surgeons, ophthalmologists, and optometrists.
Read Online or Download Corneal Topography: A Guide for Clinical Application in Wavefront Era PDF
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Additional resources for Corneal Topography: A Guide for Clinical Application in Wavefront Era
Figure 3-10 shows a pachymetric map from a healthy patient (Figure 3-10A) and a patient with keratoconus (Figure 3-10B). Pachymetry information is useful in glaucoma assessment, as well as in screening refractive surgery candidates and estimating residual corneal bed thickness postoperatively. These data are invaluable when combined with the other maps to rule out keratoconus or forme fruste keratoconus. Figures 3-11 and 3-12 illustrate the subtle differences between the forme fruste keratoconus, true keratoconus, and pellucid marginal degeneration.
Tear Film The tear film of the eye covers the anterior surface of the cornea. It is composed of 3 separate layers: an anterior lipid layer, a middle aqueous layer, and a posterior mucin layer. 18 The lipid layer is produced by meibomian glands as a means by which to increase surface tension and therefore prevent evaporation of the aqueous layer. The aqueous layer is secreted by the main lacrimal glands and the accessory lacrimal glands of Wolfring and Krause and primarily serves to lubricate the corneal epithelium.
The corneal nerves serve 2 main functions. First, they provide protection by serving as the afferent portion of an aversion reflex in response to any contact with the corneal surface. Second, corneal nerves secrete trophic factors for the preservation of corneal health. If corneal nerves are damaged either by disease or trauma, the lack of adequate production of trophic factors could lead to neurotrophic keratitis, which is characterized by epithelial sloughing and impaired healing. CORNEAL OPTICS The cornea is the first structure that interacts with light as it is being transferred into the eye and contributes the greatest amount of refractive power.