<prompt> Subluxation of lens occurs inDown syndromeMarfans syndromeSturge Weber syndromeVon-hipple syndrome  <response>: Marfans syndrome: 214- Khurana 5th, 68- Nema 6theSUBLUXATED LENS -The lens is kept in its position by the suspensory ligaments if the ligaments are weak or improperly developed the lens get subluxedClinico-ctiological typesI. Congenital displacementa Simple ectopia lentisb Ectopia lentis et papillaec Ectopia lentis with systemic anomalies1. Marfans syndrome2. Homocystinuria3. Weil Marchesani syndrome4. Ehler s Danlos syndrome5. Hyperlysinaemia6. Stickler syndrome7. Sulphite oxidase deficiencyII. Traumatic displacement of the lens Usually associated with concussion injuries Couching is an iatrogenic posterior dislocation of lens performed as a treatment of cataract in olden days Posterior dislocation of lens- Deep AC- Tremulousness of the iris- Floating lens in the vitreousIII Consecutive or Spontaneous displacementCommon conditions - Hypermature cataract Buphthalmos High myopia Staphyloma Intraocular tumours Uveitis 