منابع مشابه
Involuntary Convergence, Eyestrain and Squint.
JOHANNESBURG IN ophthalmology there are two schools of thought, the physiological and the physical or mechanical school. Thus Williamson-Noble', dealing with my method of treating eyestrain, states: "curiously enough, Stutterheim designates the condition which his exercises are designed to improve as " involuntary convergence," whereas, as you will shortly see, it is the ability to perform the ...
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As technology and medical devices improve, there is much interest in when and how astigmatism should be corrected with refractive surgery. Astigmatism can be corrected by most forms of refractive surgery, such as using excimer lasers algorithms to ablate the cornea to compensate for the magnitude of refractive error in different meridians. Correction of astigmatism at the time of cataract surge...
متن کاملAstigmatism and diagnostic procedures.
Astigmatism represents an inability of the cornea and lens to provide a sharp image onto the retina. Correcting astigmatic errors, whether congenital, contact lens induced or surgically induced, is now an integral part of modern cataract and refractive procedures. Development of modern technology has enabled accurate diagnosis and perfect opportunities for correction; however, while cataract an...
متن کاملA Novel Method for Human Astigmatism Formulation and Measurement
Astigmatism’s defect has not yet been formulated in Physics and medical physics books theoretically. In this paper, we are trying to formulate the astigmatism’s defect. The results of formulation show that “the degree of astigmatism is negative reverse the distance that vision’s condition of astigmatism’s chart lines change conditions in dimness angle from dimness condition at infinite distance...
متن کاملA Novel Method for Human Astigmatism Formulation and Measurement
Astigmatism’s defect has not yet been formulated in Physics and medical physics books theoretically. In this paper, we are trying to formulate the astigmatism’s defect. The results of formulation show that “the degree of astigmatism is negative reverse the distance that vision’s condition of astigmatism’s chart lines change conditions in dimness angle from dimness condition at infinite distance...
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ژورنال
عنوان ژورنال: The Lancet
سال: 1904
ISSN: 0140-6736
DOI: 10.1016/s0140-6736(01)73449-6