By Ming Wang, Lance J. Kugler (eds.)
Atlas and scientific Reference advisor for Corneal Topography is the 1st corneal topography ebook that lends itself to effective snapshot seek and reference for busy clinicians at chair aspect. geared up into either map-based and disease-based sections, the e-book permits quickly reference in busy medical situations.
Images come from the generally used topographers, the Zeiss Atlas and the Oculus Pentacam, however the rules of trend acceptance may be utilized to any topographer. because of the text’s huge selection of topographic photographs and corresponding corneal stipulations, Atlas and scientific Reference consultant for Corneal Topography can be utilized facet through part with the topographer.
Designed as either a studying software for college students and a reference for clinicians to exploit while confronted with a tough topography interpretation, Atlas and medical Reference consultant for Corneal Topography could be liked by means of a large spectrum of eye care pros. common ophthalmologists, cataract and refractive surgeons, corneal experts, optometrists, and ophthalmology citizens and scholars will make the most of this useful atlas for corneal topography.
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Extra info for Atlas and Clinical Reference Guide for Corneal Topography
46 Chapter 6 PACHYMETRIC: POST REFRACTIVE SURGERY Pachymetric Maps: Post Radial Keratotomy Figure 6-8. Radial keratotomy (RK) involves flattening of the central cornea without removing any tissue. Therefore, the corneal thickness remains in the normal range centrally. Figure 6-9. Grossly normal pachymetry map. However, there is a hint of asymmetry, which is consistent with a history of 4 RK incisions. Figure 6-10. Epithelial hyperplasia in the areas of the incisions may lead to increased thickness measurements in the midperiphery.
Deviations such as this can appear similar to keratoconus and can be diagnosed as pellucid marginal degeneration only when other characteristics, such as axial power maps, are present. 24 Chapter 4 Figure 4-8. Elevation map of a patient diagnosed with pellucid marginal degeneration shows inferior elevation (red). Note that this map is indistinguishable from maps showing keratoconus. ANTERIOR ELEVATION: POST REFRACTIVE SURGERY Anterior elevation maps are the most direct way to measure tissue removed by corneal refractive surgery.
Anterior elevation map of a post photorefractive keratectomy (PRK) patient shows significantly decentered PRK ablation. The superior area (darker green) shows the flatter treatment area, which should be over the pupil. The yellow area inferiorly depicts the relative elevation of the inferior midperiphery, relative to the flattened ablation zone superiorly. Figure 4-14. Example of a decentered PRK ablation, inferiorly. A crude measurement of the ablation zone suggests the optical zone was approximately 4 mm.