gonioscopy

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Noun1.gonioscopy - an examination of the front part of the eye to check the angle where the iris meets the cornea; it is used to distinguish between open-angle glaucoma and closed-angle glaucoma
examination, scrutiny - the act of examining something closely (as for mistakes)
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The goniolens was then placed on the cornea, and the TM was engaged with the instrument at a 45[degrees] upward angle to facilitate the best visualization to the surgeon.
A goniolens was used to examine iridocorneal angles.
Gonioscopy, employing the Goldmann tri-mirror goniolens under standard conditions, was performed to visualize the angle and the angle recess; trabecular pigmentation was noted and open angle and angle closure suspects were defined according to the International Society for Geographical and Epidemiological Ophthalmology classification.
Patients were selected on the examination criteria of IOP recording with applanation tonometer, visual field recording with Humphrey's analyser and angle estimation with four mirror goniolens from these patients diagnosed cases of POAG were taken into study.
Intraocular pressure(IOP) was measured by Goldmann applanation tonometer (Haag Streit, Switzerland) and gonioscopy was done using Goldmann indirect goniolens (Volk, USA).