Abstract
The determination of the intraocular pressure by means of instruments is still a developing science. Several physical properties and mechanisms affect this measure due to the corneal shape and its rigidity. Experimental and analytical researches are tools to improve indirect technologies (tonometric devices) for this relevant quantity for ophthalmologic diagnosis. In this chapter the applanation contact tonometry is the main subject (biomechanical modeling, computational modeling, and calibration equations); nevertheless, new tonometric devices tend to avoid contact to diminish influence of probe shape in the contact procedure and also pain in the patient.
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Glossary
- CCT
-
Central corneal thickness
- CH
-
Corneal hysteresis, a measure of viscoelasticity of the cornea (elasticity)
- CRF
-
Corneal resistance factor
- DCT
-
Dynamic contour tonometer
- E
-
Linear elastic modulus (Young’s modulus)
- ECR
-
External corneal radius
- GAT
-
Goldmann applanation tonometer
- ICR
-
Internal corneal radius
- IOP
-
Intraocular pressure
- IOPcc
-
IOP compensated for corneal effects
- IOPg
-
Goldmann equivalent IOP
- IOPt
-
Intraocular pressure measured by means of a tonometer
- LCT
-
Limbal corneal thickness
- PR
-
Poisson’s ratio
- PT
-
Pneumotonometer
- WS
-
Waveform score
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Guarnieri, F.A., Guzmán, A. (2015). Biomechanical Instrumentation in Refractive Surgery. In: Guarnieri, F. (eds) Corneal Biomechanics and Refractive Surgery. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-1767-9_6
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