gonioscope

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Related to gonioscopy: gonioscopy lens

gonioscope

[′gō·nē·ə‚skōp]
(medicine)
A special optical instrument for studying in detail the angle of the anterior chamber of the eye.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Evaluation of the ACA is essential in glaucoma patients that can be subjectively evaluated with the Shaffer and Van Herick methods or gonioscopy. Different quantitative methods such as ultrasonic biomicroscopy, OCT, and Orbscan provide repeatable, accurate ACA measurements.
Kook, "Assessment of narrow angles by gonioscopy, Van Herick method and anterior segment optical coherence tomography," Japanese Journal of Ophthalmology, vol.
The global ophthalmology diagnostics and surgical devices market report provides market size estimates (Revenue USD million - 2014 to 2021) for key market segments based on diagnostic devices (autorefractometers, corneal topographers, fluorescein angiography, fundus cameras, gonioscopy, keratometry, ophthalmic echography (ultrasound), ophthalmoscopy, OCT systems, pachymetry, perimeters, slit lamps, specular microscopy, tonometry), surgical devices (contact lenses, spectacle lenses, vision care, cataract, glaucoma, refractive, and vitreoretinal surgery devices), its applications (diagnostics, surgical, and vision care), and also forecasts growth trends (CAGR% - 2017 to 2021).
After the procedure, the AC became overall deeper (Figures 6-8), the angle opened in gonioscopy (Figures 9 and 10) and the IOP decreased to a satisfactory level in OS.
At gonioscopy or histological examination, it is almost always possible to find iris tissue remains and it is considered that iris hypoplasia ranges from almost complete to mild.
The study was performed with the aim of comparing the anterior chamber angle on gonioscopy & optical coherence tomography as well as evaluating the nerve fiber layer thickness & ganglion cell layer thickness in glaucoma patients.
To detect the disorder the patients were subjected to tonometry, perimetry and gonioscopy. No changes typical of steroid glaucoma were registered.
Gonioscopy, a clinical method of viewing the angle of the anterior chamber of the eye, is essential for this diagnosis.
The remainder deals with physical examination skills, covering basic optics, subjective refraction, objective refraction, near refraction, motilities and alignment, slit lam biomicroscopy, gonioscopy, tonometry, and ophthalmoscopy.
All POAG patients satisfied the following inclusion criteria: (1) A best-corrected visual acuity ≥20/30; (2) spherical refraction within −6.00 to 0 D and a cylinder correction within [+ or -]3.0 D, antimetropia ≤2 D; (3) open angles on gonioscopy and typical glaucomatous optic disc appearances such as rim thinning, notching, excavation, hemorrhage, or retinal nerve fiber layer (RNFL) defects; and (4) glaucomatous visual field (VF) loss on at least two separate occasions with mean deviations ≥−6 dB, with clusters of three or more adjacent points depressed more than 5 dB, or two or more adjacent points depressed more than 10 dB.
All subjects were evaluated pre-operatively; detailed history, slit lamp examination, visual acuity, intraocular pressure (IOP), Goldmann 3-mirror gonioscopy, visual fields by Standard Humphrey's automated perimetry, colour vision by Ishihara's chart and fundus examination with slit lamp bio-microscopy using +78 D lens.