Proptosis

 Dry eye occurs when either the eye does not produce enough tears or when the tears evaporate too quickly. This can result from contact lens use, meibomian gland dysfunction, pregnancy, Sjögren syndrome, vitamin A deficiency, omega-3 fatty acid deficiency, LASIK surgery, and certain medications such as antihistamines, some blood pressure medication, hormone replacement therapy, and antidepressants.Chronic conjunctivitis such as from tobacco smoke exposure or infection may also lead to the condition.Diagnosis is mostly based on the symptoms, though a number of other tests may be used.