You're right about the blood supply, but it gets oxygen direct from the atmosphere, not from tears. https://www.wtamu.edu/~cbaird/sq/mobile/2015/06/25/are-ther

You're right about the blood supply, but it gets oxygen direct from the atmosphere, not from tears. https://www.wtamu.edu/~cbaird/sq/mobile/2015/06/25/are-there-any-parts-of-the-human-body-that-get-oxygen-directly-from-the-air-and-not-from-the-blood/ https://www.wtamu.edu/~cbaird/sq/mobile/2015/06/25/are-there... This is why people with corneal transplants must be very cautious about wearing contact lenses.