| congenital conus | A congenital inferior crescent on the choroid at the edge of the optic disk; not associated with myopia. Synonym: congenital conus. (05 Mar 2000) |
|---|---|
| conus | A genus of shellfish that inhabits the shores of some South Pacific islands. Several species, Conus geographus, Conus textilis, Conus aulicus, Conus tulipa, and Conus marmoreus are poisonous, their sting or spine causing acute pain, oedema, numbness, spreading paralysis, and sometimes coma and death. (05 Mar 2000) |
| conus arteriosus | The left or anterosuperior, smooth-walled portion of the cavity of the right ventricle of the heart, which begins at the supraventricular crest and terminates in the pulmonary trunk. Synonym: arterial cone, pulmonary cone, pulmonary conus. (05 Mar 2000) |
| conus elasticus | Thicker lower portion of the elastic membrane of the larynx, extending between the cricoid cartilage and the vocal ligaments, the latter actually being a thickening of the free, superior margin of the conus elasticus. Synonym: cricovocal membrane, elastic cone. Synonym: cricothyroid ligament. (05 Mar 2000) |
| conus medullaris | The tapering lower extremity of the spinal cord. Synonym: conus medullaris. (05 Mar 2000) |
| myopic conus | myopic crescent |
| pulmonary conus | The left or anterosuperior, smooth-walled portion of the cavity of the right ventricle of the heart, which begins at the supraventricular crest and terminates in the pulmonary trunk. Synonym: arterial cone, pulmonary cone, pulmonary conus. (05 Mar 2000) |
| supertraction conus | A reddish yellow conus or ring at the nasal margin of the optic disk, produced by displacement of the retinal pigment epithelium and lamina vitrea of the choroid; occurs in high myopia. (05 Mar 2000) |
| distraction conus | A conus in which the optic nerve passes through the scleral canal in a markedly oblique direction. (05 Mar 2000) |
| scleral | Relating to the sclera. Synonym: sclerotic. (05 Mar 2000) |
| scleral buckling | An operation for retinal detachment which reduces the size of the globe by indenting the sclera so that it approximates the retina. (12 Dec 1998) |
| scleral buckling operation | An operation performed in retinal detachment to indent the sclerochoroidal wall. (05 Mar 2000) |
| scleral diseases | General disorders of the sclera or white of the eye. They may include anatomic, embryologic, degenerative, or pigmentation defects. (12 Dec 1998) |
| scleral ectasia | Localised bulging of the sclera. Synonym: scleral ectasia. Origin: scler-+ G. Ektasis, an extension (05 Mar 2000) |
| scleral resection | Shortening of the outer coat of the eye in retinal separation. (05 Mar 2000) |