Experimental research on the biomechanical properties of the rabbit iris.

OBJECTIVE: To qualify the mechanical properties of the iris during its passive deformation under the condition of glaucoma. MATERIAL AND METHODS: Experiments simulating the total pupillary block was performed on isolated rabbit irises to determine the passive mechanical behavior of the intact iris. RESULTS: The relationship between the area strain(delta) and the pressure of posterior chamber relative to the anterior chamber(P') was obtained: (P1) was obtained P'+b eb1 delta.