Tonometry


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Related to Tonometry: Applanation Tonometry

Tonometry

 

the measurement of pressure—usually referring specifically to intraocular pressure. All tonometric methods are based on measurement of the eyeball’s capacity for deformation.

The approximate magnitude of intraocular pressure can be estimated by digital tonometry—the examiner making a subjective judgment of the degree of firmness of the eye by pressing it with the fingers. Greater accuracy in tonometry is achieved by the use of tonometers of varying design. Impression tonometry measures the degree of indentation of the eyeball produced by the tonometer rod and translates the reading into measures of intraocular pressure. Applanation tonometry measures the extent to which the eye can be flattened; the imprint (or tonogram) produced by a cylinder’s pressure on the eye is in the shape of a small circle, whose dimensions are converted into an index of pressure.

References in periodicals archive ?
The regression formula of the tonometry versus manometry was obtained via linear regression analysis.
Modified Schirmer tear test and rebound tonometry in blue-fronted amazon parrot (Amazona aestiva).
Rufer, "Sources of error in Goldmann applanation tonometry," Der Ophthalmologe, vol.
Tonometry is performed under a single drop of local anaesthetic.
Central index of pulse wave augmentation (AIx-calculated using applanation tonometry and the obtained tracing of the pulse wave at the radius, brachial blood pressure measurement and estimation of central pressures (i.e.
Parameters of arterial stiffness and wave reflection were assessed by applanation tonometry (SphygmoCor, AtCor Medical, version 8.0, Sydney, Australia).
Intraocular pressure was within normal limits in the right (digitally) and left eye (Goldmann applanation tonometry) respectively.
Tonometry is the method, eye care professionals use to determine this.
The inclusion criteria for group 1 included having a CCT greater than 600 [mu] and <750 [mu], being cooperative for tonometry, and lack of nystagmus, corneal edema, corneal scar, or any other corneal pathology such as band shape keratopathy, and not wearing a contact lens.
Eye examination included best-corrected visual acuity (BCVA) for far and near vision, slit lamp biomicroscopy, IOP measurements with Goldmann applanation tonometry, corneal pachymetry, gonioscopy, dilated fundus examination, and horizontal cup-disc (C/D) ratio evaluation.