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W A Douthwaite 《American journal of optometry and physiological optics》1987,64(9):711-715
A keratometer design is described which uses Drysdale's method for determining the radius of a curved surface with the use of a spherocylindrical lens system to allow simultaneous observation of the surface and center of curvature images. This not only results in a simple compact keratometer but also provides an instrument that can be used to measure the radius of curvature of the peripheral cornea. 相似文献
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W D Bockelmann 《Klinische Monatsbl?tter für Augenheilkunde》1969,155(1):123-126
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SUMNER SS 《The British journal of ophthalmology》1959,43(2):118-119
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