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Journal of Experimental Biology 30,164-169 (1953)
Published by Company of Biologists 1953

Polarized Light Studies of the Cornea : II. The Effect of Intra-Ocular Pressure

A. STANWORTH ¹

¹ Department of Ophthalmology, University of Manchester

A method is described of measuring the birefringence of the intact cornea using light reflected obliquely from its posterior surface. The value obtained (0.0037) is in reasonable agreement with the results obtained by using transmitted light and from corneal sections. The change in birefringence with an increase in intraocular pressure from 10 to 40 mm. Hg is about 7% of this. The change in birefringence was also assessed by changes in the density of the photographic image of the reflected light from the surface, and this affords a possible way in which the intraocular pressure could be measured in the human subject without touching the eye.