Retinal Nerve Fiber Layer (RNFL) Thickness and Thyroid Orbitopathy

Since its introduction, OCT has become a great tool for evaluating optic neuropathies. To date, no study has investigated its use for thyroid orbitopathy and subsequent compressive optic neuropathy. Currently, the status of the optic nerves in thyroid orbitopathy is evaluated by visual acuity, visual fields, afferent visual function, color vision, and optic disc appearance. In this study we will examine the usefulness of OCT as an additional measurement tool, and to determine if there is any abnormality of the RNFL thickness which is not observed by conventional exam techniques.