Human color vision
Human color vision
- Subject: Human color vision
- From: Bob-BTY via colorsync-users <email@hidden>
- Date: Tue, 14 Jan 2020 15:42:16 -0000
Many people don't seem to know that the lenses in the human eye start going
yellow with age. By the age of 50 most people are looking at the world
through yellow filters! I experienced this when having a lens replaced
because of cataract. The new plastic lens was clear, and when I came out of
the operating room, I could see that the dresses of the nurses (that were
grey/white stripes before) were now blue/white when I looked at them with
the new lens. With the yellow lens in my other eye they were still
grey/white! A blue sky was now qite vivid with the new plastic lens, not so
with the old yellow lens. I played about with Wratten filters to see how
yellow my original lens was, but sadly I can't find the details any more,
and nnow have two clear plastic lenses. I wonder how old the 'Standard
Observer' was?
Bob Frost
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