Text-book of ophthalmology . r E. n. MEYROWITZ. New York-pirfc [Fig. 137.—Chart for Plotting Location of Foreign Bodies in Eye. (After Weeks.)The chart modified from the one devised by Sweet is divided into mm. squares in order to facili-tate measurement and plotting. The three views (front, side, and horizontal) enable the location ofthe foreign body to be indicated precisely.—D.) in the eye at all. In these the injured eye is brought as close as possible to a very sensi-tive magnetic needle (astatic needle of Leon G6rard, sideroscope of Asmus) which under-goes deflection if there is a chip o
Text-book of ophthalmology . r E. n. MEYROWITZ. New York-pirfc [Fig. 137.—Chart for Plotting Location of Foreign Bodies in Eye. (After Weeks.)The chart modified from the one devised by Sweet is divided into mm. squares in order to facili-tate measurement and plotting. The three views (front, side, and horizontal) enable the location ofthe foreign body to be indicated precisely.—D.) in the eye at all. In these the injured eye is brought as close as possible to a very sensi-tive magnetic needle (astatic needle of Leon G6rard, sideroscope of Asmus) which under-goes deflection if there is a chip of iron present in the eye. By ascertaining at what DISEASES OF THE SCLERA 349 point of the surface of the eyeball trlis deflection is the greatest, we can determineapproximately the situation of the iron. [It is a positive proof of the presence of ironin the eye if the application of a magnet, especially the large magnet of Haab, causes bulg-ing of the iris or pain. The absence of this sign is no proof that iron is not p
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecteye, booksubjectophth
