Fig. 3.

Structural and optical properties of GELGYM. a) Collagenase induced degradation rate of GELGYM hydrogels (FD of 175% and 22.5% w/v) with varying CT from 1 to 10 min as a function of incubation time (T = 37 °C and 5% CO₂). b) Swelling ratio of GELGYM hydrogels (FD of 175% and 22.5% w/v) with varying CT from 1 to 10 min. c) Crosslinking density and an average molecular weight between nodes of gelatin-based hydrogels at different crosslinking times. d) Glucose permeability and e) optical transmittance of GELGYM hydrogels (FD of 175% and 22.5% w/v) with varying CT from 1 to 10 min in the range on 250–850 nm. f) GELGYM transparency images at different crosslinking times. PC: porcine cornea; HC: human cornea.