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      Biphasic Intraocular Pressure Response to Laser Irradiation of the Iris in Rabbits

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          Abstract

          The possibility of an acute increase in intraocular pressure (IOP) following laser iridotomy is well known. However, little attention has been paid to the hypotony after laser irradiation of the iris. We performed this study to evaluate the effect of laser irradiation of the iris on the IOP in pigmented rabbits. IOP, aqueous flare values, and aqueous prostaglandin E<sub>2</sub> levels were measured before and 1,4, 12, and 24 h after argon laser treatment. The IOP showed a prolonged reduction for 24 h following an initial transient increase. Flare values and aqueous prostaglandin E<sub>2</sub> levels reached a peak 1 h after laser treatment, followed by a progressive reduction. Argon laser peripheral iridoplasty that can separate the iris from the trabecular meshwork by the mechanical force resulting from a contraction burn is used sometimes in treating angle-closure glaucoma. Our results showed that the laser irradiation of the iris itself can cause ocular hypotony, so that this phenomenon may be another explanation of the IOP response after peripheral iridoplasty.

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          Author and article information

          Journal
          ORE
          Ophthalmic Res
          10.1159/issn.0030-3747
          Ophthalmic Research
          S. Karger AG
          0030-3747
          1423-0259
          1995
          1995
          11 December 2009
          : 27
          : 4
          : 243-248
          Affiliations
          Department of Ophthalmology, Korea University College of Medicine, Seoul, Korea
          Article
          267712 Ophthalmic Res 1995;27:243–248
          10.1159/000267712
          8539005
          © 1995 S. Karger AG, Basel

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          Page count
          Pages: 6
          Categories
          Original Paper

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