Light transmittance of the human cornea from 320 to 700 nm for different ages.

In vivo relative corneal transmittance was estimated using Tan's [(1971) Vision in the ultraviolet, thesis, University of Utrecht, The Netherlands] data on scotopic spectral sensitivity in aphakic eyes. This was combined with in vitro corneal transmittance data and in vivo light scattering data to arrive at absolute data. All data combined, the following function (no age dependence is found) resulted: log(transmittance) = -0.016-c*lambda-4 (lambda = wavelength in nm, lambda > 310 nm). c = 85*10(8) nm4 for direct transmittance (acceptance angle of the order of 1 deg) and c = 21*10(8) nm4 for total transmittance (acceptance angle close to 180 deg).