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Franciscus Cornelis Donders (1818-1889).
Ir J Med Sci
September 2015
Department of Ophthalmology, University of Kentucky, Lexington, USA.
Franciscus Cornelis Donders was educated at Duizel and Boxmeer before entering the Military Medical School and the medical faculty at Utrecht University in 1835. In 1840, he received his MD from Leiden and spent 2 years in practice at Vlissingen before returning to Utrecht, where he was appointed as an extraordinary professor to lecture on forensic medicine, anthropology, general biology and ophthalmology. Refraction by the eye is complex, since the ray of light passes through many changes of refractive index in its path, and Donders simplified the account of the process by establishing an equivalent refractive system: the reduced eye.
View Article and Find Full Text PDF[Snellen visual acuity evaluation].
Arq Bras Oftalmol
May 2010
Hospital de Olhos do Paraná, Curitiba, PR, Brasil.
Purpose: To evaluate the visual acuity (VA) measurement by Snellen chart at three main Ophthalmology centers in Curitiba, compare these measurements with a computerized method for calibrating VA and also with the standard theory developed by Hermann Snellen.
Methods: Descriptive study including 15 Ophthalmology clinics and a computerized method to measure the VA. Using a tape measure and a caliper, measurement of the distance was obtained from the sitting patients' eye to VA optotypes projection on the wall.
Laser epithelial keratomileusis for myopia with the autonomous laser.
J Refract Surg
December 2002
University of Texas Medical Center, Department of Ophthalmology and Visual Science, Hermann Eye Center, Houston 77030, USA.
Purpose: To describe the refractive outcome, objective clinical data, and subjective patient experiences after laser epithelial keratomileusis (LASEK) at 1, 3, and 6 months after surgery.
Methods: This was a retrospective, nonrandomized, comparative study of 58 LASEK-treated eyes (36 patients) with myopia (with and without astigmatism) between -1.50 and -14.
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