Twenty-four patients with spontaneous acute closed-angle glaucoma in one eye were selected for study. All 24 eyes had a peripheral iridectomy, were normotensive, and had no gonioscopically visible peripheral anterior synechiae. Of the 24 contralateral eyes 14 gave a positive response to provocative tests and had peripheral iridectomy. The remaining 10 eyes did not give positive responses to the tests and were on no treatment. The 24 pairs of eyes were provoked with pilocarpine and phenylephrine. Tonography was performed at the start of the test, 1 1/2 hours later, and at its termination. At the start of the test the 24 eyes that had had spontaneous closed-angle glaucoma showed a higher pressure and lower outflow facility than the 24 contralateral eyes. This difference disappeared as the test progressed. It is concluded that apparently normal eyes--after an acute attack--do none the less show a significant degree of damage to the outflow system. Ten pairs of eyes from 10 normal persons were provoked in a similar fashion and at no point did a significant difference appear between right and left eyes.
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