gonioscopy


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to gonioscopy: gonioscopy lens

gonioscopy

 [go″ne-os´kah-pe]
examination of the angle of the anterior chamber of the eye with a gonioscope.

go·ni·os·co·py

(gō'nē-os'kŏ-pē),
Examination of the angle of the anterior chamber of the eye with a gonioscope or with a contact prism lens.

gonioscopy

(gō′nē-ŏs′kə-pē)
n.
Examination of the angle of the anterior chamber of the eye with a gonioscope or with a contact prism lens.

go·ni·os·co·py

(gō'nē-os'kŏ-pē)
Examination of the angle of the anterior chamber of the eye with a gonioscope or with a contact prism lens.

gonioscopy

Observation of the angle of the anterior chamber of the eye with a gonioscope. When the angle is wide open all structures are visible (cornea, Schwalbe's line, trabecular meshwork, scleral spur, ciliary body); when the angle is closed only the cornea is seen. The width of the angle can be described according to either Shaffer classification (grade 4, wide open (35º-45º): grade 3, moderately open (25º-34º); grade 2, moderately narrow (20º); grade 1, very narrow (10º); grade 0, closed (0º), or Spaeth classification, which categorizes the angle estimated in degrees, as well as the location of the iris insertion and iris curvature. See Shaffer and Schwartz van Herick method.
direct gonioscopy Observation of the virtual, erect image of the angle of the anterior chamber as formed by a gonioscopic lens (e.g. Koeppe lens). The image can be viewed with a handheld magnification system with the patient in a supine position.
indentation gonioscopy Gonioscopy performed when the angle of the anterior chamber is closed in order to determine whether the closure is appositional or synechial. It is usually done with the four-mirror Zeiss lens by pressing the lens against the cornea forcing the aqueous into the peripheral part of the angle and pushing the iris posteriorly: If the angle is closed by apposition between the iris and cornea (appositional closure) the angle will open. If the angle is closed by adhesion between the iris and cornea (synechial closure) it will remain closed.
indirect gonioscopy Observation of the real, inverted image of the angle of the anterior chamber as formed by a gonioscopic lens, such as the Goldmann or Zeiss lens. The image is viewed through a biomicroscope. This is the most commonly used gonioscopic method.
Table G2 Structures of the angle of the anterior chamber as seen by gonioscopy in an individual in whom the angle is open and none of the structures is obscured by the iris
structure (anterior to posterior)anatomy/physiologynormal appearance
Schwalbe's lineposterior termination of Descemet's membranenot always discernible off-white ridge; pigment may collect on it
trabecular meshworksite of aqueous flow; covers internal part of Schlemm's canalvariable degree of pigmentation
scleral spurstrip of scleral tissuethin white line
ciliary body bandanterior face of ciliary body in the angle recesspigmented seen more easily if iris is moved backward

gonioscopy

examination of the angle of the anterior chamber of the eye with a gonioscope.
References in periodicals archive ?
3, obvious asymmetric IOP or C/D for both eyes, corneal edema, notably increased corneal diameter, Haab's striae, or apparent choroid thickening were detected, the PWS patients were required to be hospitalized for gonioscopy and ultrasound biomicroscopy under general anesthesia.
All patients were examined by using slit-lamp examination, recorded intraocular pressure with Goldman applanation Tonometer, Gonioscopy.
Materials and Methods: Fellow eyes of 34 cases with unilateral PEX were evaluated by slit-lamp and gonioscopy.
The global ophthalmology devices, diagnostics and surgical equipment market report provides market size estimates (Revenue USD million - 2013 to 2020) 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% - 2016 to 2020).
At screening; detailed ophthalmic and medical history, best corrected visual acuity, ophthalmic evaluation including cup disc ratio, gonioscopy and IOP measurement with a calibrated Goldman Applanation Tonometer (GAT) in both eyes were carried out.
Patients were submitted to routine ophthalmic examination based on menace and dazzle reflexes, Schirmer's tear test (Teste de Schirmer[R], Ophthalmos, Brazil), slit lamp biomicroscopy (SL-14-Portable Slit Lamp[R], Kowa, Japan), gonioscopy (Koeppe Medium Diagnostic Lens[R] 18mm, Ocular Instruments Inc.
A thorough ocular examination was carried out including Visual acuity examination (aided and unaided), pupillary reactions, extra ocular motility, intraocular pressure (IOP) check, gonioscopy and detailed anterior and posterior segment examination of both eyes.
This evaluation may include IOP measurement with a Goldmann tonometer, magnified stereoscopic visualization (as with the slit-lamp biomicroscope) of the optic disc and nerve fiber layer through a dilated pupil, visual field testing, and gonioscopy (ie, inspection of the angle).
A number of hands-on workshops, including lacrimal syringing, punctum plugging, gonioscopy and peripheral retinal imaging, will also run throughout the event.
Tenders are invited for Purchase of gonioscope for identation gonioscopy
Ocular examination including recording of best corrected visual acuity using Snellen's chart, measurement of intra-ocular pressure by applanation tonometry, slit lamp examination for rubeosis iridis, gonioscopy for new vessels of angle were done.