Keratoconus: Classification scheme based on videokeratography and clinical signs
نویسندگان
چکیده
منابع مشابه
Progression of keratoconus assessed by fourier analysis of videokeratography data.
OBJECTIVE To quantitatively document changes in corneal refractive parameters in relation to the progression of keratoconus over years. DESIGN Retrospective observational case series. PARTICIPANTS Eighty-five eyes of 64 patients with keratoconus who had undergone videokeratography examinations at least twice with an interval of 1 year or longer between each examination. METHODS By means o...
متن کاملKISA% index: a quantitative videokeratography algorithm embodying minimal topographic criteria for diagnosing keratoconus.
PURPOSE To formulate and test an algorithm using minimal topographic criteria for accurately diagnosing clinical keratoconus. SETTING Subspecialty cornea practice and Keratoconus Genetic Research Project. METHODS Both eyes of 86 keratoconic patients who had never worn contact lenses and 195 normal participants were studied with the TMS-1 videokeratoscope to evaluate the KISA% index, an algo...
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With a prevalence of approximately 50 %, arterial hypertension is a very common disease. Blood pressure is a risk factor of secondary diseases such as stroke, CHD and cardiac insufficiency. Social connections as well as a relationship between hypertension, body weight and age are apparent. Many individuals with hypertension are not treated at all or receive insufficient therapy and, in many cas...
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K nearest neighbor algorithm is one of the most frequently used techniques in data mining for its integrity and performance. Though the KNN algorithm is highly effective in many cases, it has some essential deficiencies, which affects the classification accuracy of the algorithm. First, the effectiveness of the algorithm is affected by redundant and irrelevant features. Furthermore, this algori...
متن کاملValidation of the estimation of corneal aberrations from videokeratography in keratoconus.
PURPOSE To validate the estimation of corneal aberrations from videokeratography against a laser ray tracing technique that measured total eye aberrations, in eyes without keratoconus (ie, cornea-dominated wave aberrations). METHODS We measured total and corneal wave aberrations of three eyes diagnosed with keratoconus by slit-lamp microscopy and corneal topography: two eyes from one patient ...
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ژورنال
عنوان ژورنال: Journal of Cataract and Refractive Surgery
سال: 2009
ISSN: 0886-3350
DOI: 10.1016/j.jcrs.2009.03.050