Do I have enophthalmos? I've had a dry and burning sensation in my left eye for several years. (Photos)

You appear to have either sunken left eye (enophthalmos) and/or droopy left upper eyelid (ptosis). See an oculoplastic specialist for evaluation. Treatment is possible.

That is far more important then being told you need a CT scan.  This could simply be left upper eyelid ptosis.  It would be helpful to know your detailed history.  Optometrist simply lack the training needed to be of much help with your issue.  Even an ophthalmologist (an eye MD) often is not a substitute for an fellowship trained oculplastic surgeon.

Enophthalmos, the condition of one ocular globe situated abnormally deep into the orbit, most commonly results from a large, untreated or undertreated orbital floor blow-out fracture.  The diagnosis is suggested by clinical presentation and confirmed by imaging (CT scan).  Understanding your history and thorough in person examination are important to know why your appearance is asymmetric.  Although possibly enophthalmos, your online photos provide insufficient data to offer a definite professional opinion.  So, to answer your question, YES, see a plastic surgeon (we're all trained and experienced in orbital surgery) in your area in pursuit of formal evaluation and management.

Your photographs support either diagnosis but your history of the eye appearing sunken and smaller points toward some form of enophthalmos. An examination by a plastic surgeon knowledgeable about these entities will be able to measure the orbit on physical exam with an instrument to measure the distance of the cornea from the bony rims. Imaging in the form of CT and or MRI will help show if there is a true volume difference or not. Plastic surgeons who do craniofacial surgery will be the most knowledgeable in the medical community I believe.

Thank you for your question. I can understand your concern. It is not possible to determine if this is enophtalmos (sinking in) of your left eye or another problem from these photos alone.. An in person consultation with an Oculoplastic surgeon is necessary to examine and measure your eyes and their respective forward projections. If a difference is noted then a C-T scan or MRI might be helpful. The difference that you see may also be a lid droop. The exam will determine the cause and then possible solutions can be offered.