Rings in Ophthalmology

 Rings in Ophthalmology

Acanthamoeba Keratitis

• Arcus Senilis:Corneal grey ring shaped degeneration seen in old age.

• Ring Abscess: The hallmark of acanthamoeba Keratitis.
• Kayser-Fleischer’s ring: Copper deposition in descemet’s memberane  secondary to wilson’s disease.
• Corneal rust ring: A small, reddish brown, circular Opacity in the Cornea after the removal of an iron foreign body.
• Coats’ white ring: Fine iron deposits in the bowman’s layer remaining after removal of a corneal foreign body.
• Fleisher’s Ring: Visible iron deposition all
  
  around the base of a cone in keratoconus.
• Pseudo-fleischer’s ring: Corneal iron deposition seen in hyperopia.
• Soemmering’s ring:Early opacification of posterior lens capsule in traumatic cataract.
• Vossius’ ring: Pigment deposition on lens in concussion injury to eye.

Vossius Ring

• Weiss ring: Seen in hypoplasia of the optic disc
• Hoarfrost ring: PEX deposits on anterior lens capsule
• Ring scotoma: Annular visual field defect centered on fixation point
• Capsular tension ring(ctr):Surgical device indicated for the stabilization of weakened, broken, or missing zonules that are suspected or observed during lens extraction.