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)?
Okay, now I know what the Frenzel is. The other user just asked this question. I don't understand why you would need to do this in scuba diving to clear your eyes, but I would understand doing this to clear your frontal, paranasal, ethmoid and maxillary sinuses. The eye and eye socket are not pneumonized and therefore don't undergoe the same changes which pneumonized air cavities do under several atmospheres of pressure (lungs, middle ear, air sinuses) under normal circumstances. There are anomalous or pathologic situations where there can be a "air" connection between the oral/nasal cavity/tear ducts and eye socket...in this case the Frenzel maneuver would cause the eye socket to be pneumonized (pressurized with air) and potentially cause orbital emphysema. This won't affect the intraocular structures such as the iris or lens or ciliary body. If this is occuring I'd definitely get it checked out and possibly avoid scuba diving.
Timothy D. McGarity, M.D.
Copyright 1994-2016 MedHelp International. All rights reserved.
MedHelp is a division of Aptus Health.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.