A transparent native, non-fibrilized collagen material is described having an absorbence at a wavelength of 900 nm of less than 5% in a sample 5 mm thick. This collagen material is useful for a prosthetic replacement of the cornea because of the high transparency and because it is a native material,...http://www.google.es/patents/US4505855?utm_source=gb-gplus-sharePatente US4505855 - Transparent non-fibrilized collagen material by ultracentrifugation
Transparent non-fibrilized collagen material by ultracentrifugation
