drusen of the optic nerve head

dru·sen of the op·tic nerve head

basophilic, laminated, calcareous acellular masses that resemble crystals within the nerve head, anterior to the lamina cribrosa, that may simulate papilledema and/or cause visual field defects.
References in periodicals archive ?
A comparison of imaging techniques for diagnosing drusen of the optic nerve head.
Drusen of the optic nerve head are relatively benign and asymptomatic.
A new fundus image was done, which showed drusen of the optic nerve head, which were no longer masked by hemorrhages.