I second JB1105's recommendation. Both are great sites with lots of experienced CPAP users giving out some great advice. I also participate in the www.apneasupport.org site.
One of the more common reasons given for swollen eyes is an air leak. This also means that the pressure is not optimal, and he's not getting the full amount of air pressure into his lungs. Another reason is pressure by the mask on the face, preventing venous outflow from the eyelids. Loosening (not too much to cause a leak) the straps is one option, and another option is to change masks. If he's only recently started using the mask, I would give it some more time to get used to. If it's not improved, talk to your durable goods equipment company or your sleep doctor.
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.