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  • Title: Measurement of light transmittance of cryopreserved human amniotic membrane.
    Author: Ijiri S, Kobayashi A, Sugiyama K, Tseng SC.
    Journal: Cornea; 2006 Oct; 25(9):1080-3. PubMed ID: 17133058.
    Abstract:
    PURPOSE: To measure the light transmission of human amniotic membrane (AM) and compare it with that of therapeutic soft contact lens (TSCL). METHODS: Total light transmittance of each sample (4 AMs and 2 TSCLs) was measured in the 250- to 800-nm range by using a spectrophotometer. RESULTS: The percent light transmission of TSCL was nearly 100% at wavelengths greater than 450 nm, decreased gradually in the sub-450-nm range, and reached 78.4 +/- 3.7 at 250 nm. In contrast, the percent transmission of the 4 AMs decreased gradually and continually throughout the spectrum as wavelength shortened. The transmission of light through AM dropped to less than 20% at 250 nm but remained 90% or more at wavelengths more than 600 nm. CONCLUSION: Light transmittance properties of cryopreserved human AM and human cornea are relatively similar, but AM (and not cornea) allows transmission of 24.6% of UVC.
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