Rings in Ophthalmology

 Rings in Ophthalmology

Acanthamoeba Keratitis

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

• Ring Abscess: The hallmark of acanthamoeba Keratitis.
• Kayser-Fleischer’s ring: Copper deposition in Descemet's membrane 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 was seen in hyperopia.
• Soemmering’s ring: Early opacification of the posterior lens capsule in traumatic cataract.
• Vossius’ ring: Pigment deposition on the lens in concussion injury to the eye.

Vossius Ring

• Weiss ring: Seen in hypoplasia of the optic disc
• Hoarfrost ring: PEX deposits on the anterior lens capsule
• Ring scotoma: Annular visual field defect centred on the 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.