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Changes in the Coefficient of Ocular Rigidity During the Water Provocative Test

S. M. DRANCE, M.D., F.R.C.S. (Eng.)

Arch Ophthalmol. 1963;69(1):39-43.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

The water test has remained a valuable and simple provocative measure in establishing a diagnosis of chronic simple glaucoma. The most disturbing feature has been the low percentage of positive results obtained in cases of established glaucoma. The proportion of positive results increases with the severity of the glaucomatous process and has been related to the height of the intraocular pressure prior to the start of the test. When the intraocular pressure is continually elevated, the water test loses its diagnostic significance. The percentage of positive results reported in diseased eyes varied from 32.9% reported by Leydhecker¹ and 45% reported by Kronfeld.² Drance³ reported that approximately 1 in 3 of all the patients undergoing a water provocative study had an inadequate hemodilution, and a positive test could therefore not be expected. Negative tests in those cases have no bearing on the evaluation of the glaucomatous process. More . . . [Full Text PDF of this Article]

Author Affiliations
Saskatoon, Sask., Canada

Glaucoma Clinic, University of Saskatchewan.

Footnotes
Submitted for publication May 4, 1962.

Supported by Dominion-Provincial Grant No. 607-9-160 and in part by the Bob Hope Fight for Sight Fund of the National Council to Combat Blindness Inc., New York City.

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