ocular rigidity

oc·u·lar ri·gid·i·ty

the resistance offered by the eyeball to a change in intraocular volume; manifested as a change in intraocular pressure.

rigidity, ocular 

The resistance of the coats of the eye to indentation. This factor is taken into account in the tables used when determining the intraocular pressure by means of an indentation tonometer such as that of Schiötz. The tables are based on an eye of average ocular rigidity but if the eye has high or low rigidity, an error is introduced into the readings: means of minimizing this effect have been devised. See impression tonometer.
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References in periodicals archive ?
Corneal elasticity and ocular rigidity in normal and keratoconic eyes.
Tsilimbaris et al., "Ocular rigidity, ocular pulse amplitude, and pulsatile ocular blood flow: the effect of axial length," Investigative Ophthalmology & Visual Science, vol.
Myopic patients having decreased ocular rigidity transmits greater force of contraction of ciliary muscles to the choroid and sclera.
Ocular rigidity is a macroscopic parameter characterizing the relationship between pressure and volume changes in the human eye.
Although it is well known that diabetes mellitus interferes with the vascular integrity of the ocular tissues [23], the relationship between diabetes and ocular rigidity has received little attention.
The relationship between IOP increase and infused volume was used to calculate the ocular rigidity coefficient [17] while the IOP decay during outflow was used to calculate the outflow facility coefficient [18].
(8) The increase of IOP with age may be caused by age-dependent changes of ocular rigidity. In humans, an increase of ocular rigidity was observed with increasing age and was positively correlated to IOP.
(16,17) As none of the tonometers used in the present study allowed the evaluation of CCT or other parameters which may affect IOP measurement such as ocular rigidity or hysteresis, we used IOP values adjusted for CCT in our analysis.
Schmetterer, "Estimation of ocular rigidity based on measurement of pulse amplitude using pneumotonometry and fundus pulse using laser interferometry in glaucoma," Investigative Ophthalmology & Visual Science, vol.
Zinkernagel, "Non-invasive biometric assessment of ocular rigidity in glaucoma patients and controls," Eye, vol.
Moreover, myopic eyes have a lower ocular rigidity than emmetropic and hyperopic eyes [27, 28].
Schmetterer, "Dependence of ocular rigidity on eye length: a study comparing ocular pressure pulse and ocular fundus pulse in healthy subjects," Investigative Ophthalmology & Visual Science, vol.