porus opticus


Also found in: Dictionary, Thesaurus, Encyclopedia.

porus

 [por´us] (L.)
porus acus´ticus exter´nus the outer end of the external acoustic meatus.
porus acus´ticus inter´nus the opening of the internal acoustic meatus in the cranial cavity.
porus op´ticus the opening in the sclera for passage of the optic nerve.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

op·tic disc

[TA]
an oval area of the ocular fundus devoid of light receptors where the axons of the retinal ganglion cell converge to form the optic nerve head;
Farlex Partner Medical Dictionary © Farlex 2012

porus opticus

(1) Cribriform lamina of sclera (lamina cribrosa sclerae [NA6]); perforated layer of sclera.
(2) Optic disk (see there); discus nervi optici [NA6].
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.