By Ming Wang MD
In this moment variation, Dr. Ming Wang, Dr. Tracy Swartz and over 50 individuals mix the $64000 issues of refractive and top class lens surgical procedures and placed corneal topography within the context of wavefront know-how. With over 500 photographs, this version supplies designated recognition to the most recent advances in those technologies.
The state of the art technological know-how and alertness of corneal topography for those anterior section surgical procedures is definitely represented in Corneal Topography, A consultant for scientific software 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 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 lined Include:
• Topographies of corneal illnesses, together with post-RK/CK/LASIK/PRK
• Topography-guided touch lens fitting
• Topography program in refractive surgical procedure and in top class IOL surgeries
• Topographic assistance for corneal surgeries
• Topography-guided customized treatments
• mixed therapy innovations utilizing topography and wavefront data
• destiny improvement of corneal topography within the wavefront era
Updated and reorganized to mirror alterations within the expertise, Corneal Topography: A consultant for scientific program within the Wavefront period, moment version is indispensible for all anterior section surgeons, ophthalmologists, and optometrists.
Read 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
Many systems incorporate several maps into a single display. This patient reported visual distortion and glare, which was most easily explained by the refractive power map (lower right). The refractive map displays the calculated refractive power of the cornea based on Snell’s law of refraction. It correlates vision to corneal shape. It is not often used; however, it may identify distortion in vision related to focal irregularities in the cornea and explain vision loss not apparent upon slit-lamp examination (Figure 3-5).
Keratorefractive surgeries are successful because the optical properties of the eye can be manipulated by changing the shape of the cornea. With radial keratotomy, the central cornea is flattened due to relaxing incisions (Figure 2-5). When using excimer procedures, the prolate structure of the cornea is changed by the removal of a convex positive meniscus for myopic ablations (Figure 2-6), a concave positive meniscus for hyperopic corrections (Figure 2-7), and a toric positive meniscus in astigmatic corrections.
CONCLUSION The understanding of natural corneal optics and how they are changed with keratorefractive surgery is required for all corneal surgeons. Surgical planning must incorporate the knowledge to safeguard the patient from visual quality issues arising from drastic changes in corneal architecture. While night vision issues, glare, and distortion are minimized by increased ablation zones and improved ablation profiles, significant treatments in less-than-ideal patients may result in undesirable topographical abnormalities.