Lattice degeneration

Lattice degeneration:

  1.  5% to 10% of the population, varies in extensiveness but 30% of all RRDs.
  2.  It is commoner in myopes and connective tissue syndromes ( Stickler).
  3.  usually asymptomatic.
  4.  typically detected as an incidental finding during routine ophthalmoscopy
  5. Thin, well-demarcated, pigmented ovoid patches of retina
  6. typically circumferential but may be radial (
  7. in Stickler).
  8. Within the involved area, there may be sclerotic vessels or atrophic holes.
  9. Although usually darkly pigmented, it may appear hypo-pigmented
  10. The vitreous overlying lattice degeneration is liquefied while on the edges of lattice, there is firm vitreoretinal adhesion

Complications:

 Retinal tears may occur at posterior margin and at the ends of areas of
lattice (due to strong vitreous adhesion)
  1.  retinal detachment.
  2. in only 1% of patients with lattice degeneration.
  3. Prophylactic laser treatment is not usually performed in asymptomatic eyes
  4.  laser treatment of lattice is only recommended if the retina of fellow eye has previously detached on top of lattice

OCT picture of lattice


firm vitreoretinal adhesions on the edges with clear vitreous overlying the lesion( U- shaped in appearance )
  1. The involved retina typically demonstrates generalized thinning
  2. Subclinical retinal detachment is very common with minor cystic retinal degeneration

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