De-Pablo-Gómez-de-Liaño L, et al. - Through a cross-sectional observational study done in 62 eyes of 31 individuals with Graves' ophthalmopathy, experts evaluated the association between optical coherence tomography (OCT) and MRI measurements of extraocular rectus muscle thickness. For the whole patient cohort, relationship between the OCT-MR and maximum transversal diameter MRI (T-MRI) measurements, muscle area MRI (A-MRI), and craniocaudal diameter MRI was observed. In patients with clinically active Graves' ophthalmopathy, associations with T-MRI and A-MRI were greater. Between OCT and MRI measurements of lateral rectus thickness, no relationships were discovered, irrespective of disease phase. Hence, the relationships noted infer that in patients with Graves' ophthalmopathy, OCT could be a complementary evaluation or screening procedure to identify thickening of the anterior portion of the medial rectus muscle, which could be particularly beneficial when MRI is not accessible.