The adult eye does not change size as the eyeball wall sclera/cornea. Are extremely strong and rigid. However the eye may appear to be larger or smaller due to several problems, some of them very serious, that may make an eye look larger or smaller.
The first of these is if the eyelids, mainly the upper lid is lower on one side than the other (ptosis) or elevated (eyelid retraction). The second is if the eyeball is being pushed forward (exophthalmos) or sinking into the orbit (enophthalmos).
It is very very important you see an ophthalmologist to find out which of these problems you have. It is very helpful to the Eye MD if you take in some good photos of you taken 10-20 years ago that show the position of your eyes and your eyelids so he/she can see what has changed and that the doctor look at you before the technicians have put any eye drops in your eyes.
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. MedHelp 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.