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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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.
Myopic patients having decreased ocular rigidity transmits greater force of contraction of ciliary muscles to the choroid and sclera.
In humans, an increase of ocular rigidity was observed with increasing age and was positively correlated to IOP.