The frequent appearance of xerosis and keratomalacia in adults in North China, as already reported by Pillat,1 has given me the opportunity to perform with more accuracy the examination of the generally known changes in the sensibility to touch of the cornea and the conjunctiva in the course of these diseases. On the basis of these observations, I venture to contribute to the explanation of the genesis of these diseases.
METHOD OF EXAMINATION
As test objects for examining sensibility, irritating hairs prepared after von Frey's2 specifications were used. At one end of a thin wooden stick about 8 cm. in length a hair is fastened with sealing wax at right angles to the stick. The length of the hair varies according to the effect desired. The hairs used for such a test should be as straight as possible. Irritation is produced by holding the handle so
JOHN I. THE DISTURBANCES OF SENSIBILITY OF THE CORNEA AND CONJUNCTIVA IN XEROSIS AND KERATOMALACIA OF ADULTS: WITH A CONTRIBUTION TO THE EXPLANATION OF THE GENESIS OF THESE DISEASES. Arch Ophthalmol. 1931;5(3):374–391. doi:10.1001/archopht.1931.00820030058006
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