Fig. 1.

Schematic of the experimental apparatus used for the inflation test of the human sclera. The specimens were glued on a holder and placed on a pressure chamber. The pressure in the chamber was measured with a pressure transducer and changed by controlled-injection of PBS. During testing, the deforming scleral surface was imaged by two charge-coupled device cameras positioned 50cm above the specimen and oriented 15deg from the vertical axis on opposite sides. The white scleral surface was speckled by dispersing graphite powder through a 62 μm mesh to provide a high contrast pattern for DIC.