Aim The aim of this study is to compare the choroidal, retinal, and peripapillary nerve fiber layer thickness of the patients diagnosed with hyperthyroidism but did not develop ophthalmopathy with the euthyroid patients. Material and Methods: Thyroid stimulating hormone (TSH), freeT3 (fT3) and freeT4 (fT4) tests of the patients were analyzed. Cases who came in with symptoms of hyperthyroidism and had a TSH lower than 0.5 mu/L were included to the study. Retinal thickness (RT), retinal nerve fiber layer (RNFL) thickness, and choroidal thickness (CT) were calculated by means of spectral domain optical coherence tomography. Results: A total of 82 participants, covering 40 (49%) hyperthyroid patients and 42 (51%) euthyroid healthy individuals, were examined. In terms of RT measurements, T500,T1000,T1500 and N1500 values were found to be lower in the HT group compared to the control group, and they were statistically significant (p