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Conjunctival Degenerations


  1. Pinguecula:
    1. Yellow white deposits on the bulbar conjunctiva adjacent to the limbus.
    2. Histology: Degeneration of collagen fibers of conjunctival stroma with thinning of epithelium and calcification.
  2. Pterygium:
  1. Triangular, Fibro vascular proliferation of conjunctiva elastotic degeneration of conjunctiva issue.
  • Irritation
  • Dryness of eyes
  • Dimunition of vision ( due to with-the rule astigmatism)
  • Triangular fibrovascular fleshy ingrowth
  • M/C on nasal side(96%). Only 4% are temporal
  • Glassrod test : to distinguish from pseudo-pterygium. Glass rod can be easily passed below pseuso-pterygium
  • Consists of a head , cap and body
  • Active pterygium: vascularization follows infiltration
  • Inactive/ atrophic ptreygium : infiltration lags vascularization
  • Deposition of iron in corneal epithelium anterior to advancing head of pterygium is called"Stocker's line"*
Treatment :
  • Surgical excision with conjunctiva graft. (bare sclera)
  • Postoperative use of beta-Radiation, topical Thiotepa or Mitomycin-C may also be effective in prevention of recurrence.
  • Also conjunctival autograft/amniotic membrane used. 
  1. Concretions: Small yellow white deposits present in palpebral conjunctiva.
  2. Retention cyst:
    Asymptomatic thin walled lesion containing clear fluid. It is due to obstruction of Krause’s gland.
  3. Other conjunctival Cysts are:
    1. Lymphangiectasis: Dilatation of lymph spaces.
    2. Implantation cyst: Occur following squint surgery.
    3. Hydatid cyst or cysticercosis cyst.
    4. Lymphangioma: It is a solitary multilocular cyst.

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