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Roberto Sanchez, Anibal de Paul, Luis Issolio; In vivo transmission assessment of the human eye. Journal of Vision 2017;17(7):46. doi: 10.1167/17.7.46.
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Using the double-pass (DP) technique we estimate the “in vivo” transmission of the human eye. DP images were recorded on an artificial eye for different powers of a laser beam of 780 nm. The intensities of a peripheral area (25 to 35 arc min) were averaged for each image and a linear relationship between the amount of scattered energy around the central area and the laser power was found. Interposing neutral and diffusion filters before the artificial eye we found that the slopes of the lines (PNR) are ordered according to the transmittance of the filters. We obtained similar results changing the reflectance of the artificial retina. From these findings it was possible to obtain a calibration function that determines the transmittance of the eye through the PNR values. In a second measurement, ten eyes of volunteer subjects were assessed, obtaining overall eye transmittance values between 35 and 45%. The transmittance values are lower than those found in the “post mortem” data based literature (around 80%). This could be because those measurements did not include the transmittance of the retina which is relatively low because it is a tissue that absorbs much of the light.
Meeting abstract presented at the 2016 OSA Fall Vision Meeting
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