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Air Pressure build up in the tearduct
if you were to pinch your nostrils and blow really hard to clear your ears (frenzel maneuver) ,could the air pressure build up in the tear duct or at the back of the eye and have an negative effect on iris color causing a discolouration (basically a change in eye color)?
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Never  ever.

JCH MD
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Air Pressure build up in the tearduct
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