منابع مشابه
Delimiting diagrams
We introduce the unifying notion of delimiting diagram. Hitherto unrelated results such as: Minimality of the internal needed strategy for orthogonal first-order term rewriting systems, maximality of the limit strategy for orthogonal higher-order pattern rewrite systems (with maximality of the strategy F∞ for the λ-calculus as a special case), and uniform normalisation of balanced weak Church–R...
متن کاملFemtosecond - Assisted Astigmatic Keratotomy
T he treatment of moderate to high astigmatism is challenging for the refractive surgeon. Even in experienced hands, 40% of patients who undergo penetrating keratoplasty (PKP) are left with more than 4.00 D of astigmatism.1 Spectacles, contact lenses, excimer laser ablation, toric IOLs, and tissue-relaxing procedures have been used for a long time in the treatment of preexisting and postsurgica...
متن کاملHistopathology of radial keratotomy.
Report of a Case. A 39-year-old man with a history of RK performed elsewhere 8 years prior had complaints of decreased vision in both eyes. The patient’s preoperative refraction was –9.25 OD and –9.50 OS. According to the patient, the initial surgery was uncomplicated, although both eyes required enhancements. Cycloplegic refraction in our office was –3.50 +0.50 70 OD and –13.50 +1.00 100 OS, g...
متن کاملChapter 170 - Incisional Keratotomy
First conceptualized by Lans, incisional keratotomy is widely used for treating astigmatism, although it is now only infrequently used for treating myopia. The current methods of refractive keratotomy derive from the work of Fyodorov in Russia in the mid-twentieth century. Radial incisions cause the peripheral cornea to bulge outward, producing central flattening. Astigmatic keratotomy (AK) and...
متن کاملRadial keratotomy associated endothelial degeneration
PURPOSE To describe the presentation and clinical course of eyes with a history of radial keratotomy (RK) and varying degrees of endothelial degeneration. METHODS Retrospective case series were used. RESULTS Thirteen eyes (seven patients) were identified with clinical findings of significant guttata and a prior history of RK. The mean age of presentation for cornea evaluation was 54.3 years...
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ژورنال
عنوان ژورنال: American Journal of Ophthalmology
سال: 1922
ISSN: 0002-9394
DOI: 10.1016/s0002-9394(22)90154-0