1. Results for Water-drinking Test, before and after Laser Iridotomy, in Primary Angle-closure Suspects
- Author
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Zahra Tajbakhsh, Parisa Karampour, M. Hossein Nowroozzadeh, Masoumeh Masoumpour, and M. Reza Razeghinejad
- Subjects
Male ,Iridectomy ,medicine.medical_specialty ,Intraocular pressure ,Biometry ,Provocative test ,Drinking ,Iris ,Glaucoma ,Tonometry, Ocular ,03 medical and health sciences ,0302 clinical medicine ,Laser iridotomy ,Germany ,Ophthalmology ,Humans ,Medicine ,Prospective Studies ,Prospective cohort study ,Intraocular Pressure ,Aged ,medicine.diagnostic_test ,business.industry ,Middle Aged ,medicine.disease ,Peripheral ,Eye examination ,Water drinking test ,030221 ophthalmology & optometry ,Female ,Laser Therapy ,sense organs ,Glaucoma, Angle-Closure ,business ,030217 neurology & neurosurgery ,Optometry - Abstract
SIGNIFICANCE Intraocular pressure and ocular biometric changes were similar before and after laser iridotomy in response to the water-drinking test in a cohort of patients at risk of angle closure. The water-drinking test does not seem to be a good provocative test to determine which eyes would benefit from a laser iridotomy. Our data call into question the preoperative predictive value of this test. PURPOSE The aim of this study was to evaluate the effect of water-drinking test on intraocular pressure and ocular biometric parameters, before and after laser peripheral iridotomy, in patients with an occludable angle. METHODS Twenty-seven patients, who met the inclusion criteria and had at least 180 degrees of iridotrabecular apposition, underwent a complete eye examination followed by the measurement of ocular biometric (using LenStar LS-900; Haag-Streit AG, Koeniz, Switzerland) and anterior chamber parameters (using Pentacam HR; Oculus Optikgerate GmbH, Wetzlar, Germany). All the measurements were repeated 30 minutes after the water-drinking test. Two weeks after laser peripheral iridotomy, all the measurements were repeated both before and after the water-drinking test. RESULTS The mean ± SD of the age of the participants was 57 ± 9 years, and 23 (85.2%) were male. Intraocular pressure increased after the water-drinking test in both pre-laser peripheral iridotomy (17.0 vs. 19.3 mmHg, P < .001) and post-laser peripheral iridotomy (15.6 vs. 18.6 mmHg, P < .001) conditions. The thickness values of central cornea increased slightly after the water-drinking test in pre-laser peripheral iridotomy (535 vs. 538 μm, P = .001) compared with post-laser peripheral iridotomy (532 vs. 536 μm, P = .003). The water-drinking test had no significant effect on other biometric or anterior chamber parameters, before or after laser peripheral iridotomy. CONCLUSIONS The water-drinking test increased intraocular pressure, both before and after laser peripheral iridotomy. Laser peripheral iridotomy had no significant effect on the amount of intraocular pressure change after the water-drinking test. The water-drinking test has no effect on other biometric or anterior chamber parameters.
- Published
- 2018