The invention concerns a process for preparing an allograft or xenograft material from a lens capsule, wherein the process comprises the following steps: Decellularizing (200) a lens capsule to obtain a decellularized lens capsule, Depositing (300) the decellularized capsule on a microporous support membrane to obtain a stack composed of the decellularized lens capsule and the support membrane, Lyophilizing (400) the stack to obtain a lyophilized stack, Sterilizing (500) the lyophilized stack to obtain a sterilized stack, Packaging (600) the sterilized stack to obtain allograft or xenograft materials.