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  Indian J Med Microbiol
 

Figure 3: Cryopreserved birth tissue products in ophthalmology: (a) Cryopreserved amniotic membrane was the first birth tissue product on the market. (b) The cryopreserved umbilical cord product (AmnioGuard) was available in 2010. The PROKERA family of devices comprises four models (c-f) of a biologic corneal bandage. (c) The PROKERA is designed such that an amniotic membrane is clipped to a dual polycarbonate ring system, allowing the membrane to act as a biological bandage when in contact with the cornea. (f) PROKERA PLUS model has two amniotic membrane layers, providing extra therapeutic benefit. (d) PROKERA SLIM and (e) PROKERA CLEAR both have a thinner, smaller ring (less plastic), while (e) PROKERA CLEAR also provides central aperture clearance

Figure 3: Cryopreserved birth tissue products in ophthalmology: (a) Cryopreserved amniotic membrane was the  first birth tissue product on the market. (b) The cryopreserved umbilical cord product (AmnioGuard) was available in 2010. The PROKERA family of devices comprises four models (c-f) of a biologic corneal bandage. (c) The PROKERA is designed such that an amniotic membrane is clipped to a dual polycarbonate ring system, allowing the membrane to act as a biological bandage when in contact with the cornea. (f) PROKERA PLUS model has two amniotic membrane layers, providing extra therapeutic benefit. (d) PROKERA SLIM and (e) PROKERA CLEAR both have a thinner, smaller ring (less plastic), while (e) PROKERA CLEAR also provides central aperture clearance