[Optic disc drusen. Communication 3. The possibilities of optic coherence tomography]

Twenty-six patients (45 eyes) (median age 55 years) with optic disc drusen (ODD) (a study group) and 24 healthy volunteers (47 eyes) (median age 53 years) (a control group) were examined. Nerve fiber layer thinning determined by optic coherence tomography (OCT) was found in 65% of the ODD. In 20% of the patients with ODD, nerve fiber layer thinning, as evidenced by OCT, was observed with the normal field of vision, which suggests the higher sensitivity of a morphometric study of the retinal nerve fiber layer. According to OCT data, 11% of the patients with pathological changes in the field of vision had increased retinal nerve fiber layer thickness in some quadrants or from the mean value. These changes may be associated with the large-sized optic disc in these patients.