- Thyrotoxicosis can be associated with thyroid ophtalmopathy in up to 90% of patients. We describe a 62 year old healthy man who was presented with a history of diplopia for the past half year. His medical history revealed no other complaints and neither did his physical examination. Elevated levels of the thyroid function tests were found. Diplopia alone requires medical attention and leads to the diagnosis of autoimmune thyroid disease, because finding vertical (restrictive) diplopia is actually the appearance of this particular thyroid disease.