scleral ring

scleral ring
a white ring seen adjacent to the optic disk in ophthalmoscopy when the retinal pigment epithelium and choroid do not extend to the disk.

Medical dictionary. 2011.

Игры ⚽ Нужна курсовая?

Look at other dictionaries:

  • ring — 1. A circular band surrounding a wide central opening; a r. shaped or circular structure surrounding an opening or level area. SYN: anulus [TA]. 2. The closed ( i.e., endless) chain of atoms in a cyclic compound; commonly used for “cyclic” or… …   Medical dictionary

  • Microraptor — Vertebrata Microraptor Temporal range: Early Cretaceous, 120 Ma …   Wikipedia

  • Megapnosaurus — Temporal range: 199–188 Ma …   Wikipedia

  • halo — 1. A reddish yellow ring surrounding the optic disk, due to a widening of the scleral ring making the deeper structures visible. 2. An annular flare of light surrounding a luminous body or a depigmented ring around a …   Medical dictionary

  • Diplodocus — Not to be confused with Diplocaulus. Chordata Diplodocus Temporal range: Late Jurassic, 154–150 Ma …   Wikipedia

  • Dinosaur — For other uses, see Dinosaur (disambiguation). Dinosaurs Temporal range: Late Triassic–Late Cretaceous, 231.4–65.5 Ma …   Wikipedia

  • Pterodactylus — Pterodactyl redirects here. For other uses, see Pterodactyl (disambiguation). Animalia Pterodactylus antiquus Temporal range: Late Jurassic, 150.8–148.5 Ma …   Wikipedia

  • Pterosaur — Pterosaurs Temporal range: Late Triassic–Late Cretaceous, 220–65 Ma …   Wikipedia

  • Velociraptor — This article is about the dinosaur. For the Kasabian album, see Velociraptor!. For other uses, see Raptor (disambiguation). Vertebrata Velociraptor Temporal range: Late Cretaceous, 75–71 Ma …   Wikipedia

  • Dromaeosauridae — Deuterostomia Dromaeosaurids Temporal range: Middle Jurassic – Late Cretaceous, 164–65.5 Ma …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”