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SELAMAT DATANG

SELAMAT DATANG. Dr. SANTHOSH ASSISTANT PROFESSOR DEPARTMENT OF OPHTHALMOLOGY K.M.C. MANIPAL. Ectopia lentis. Displacement of the lens from its normal position It is either completely displaced [dislocated ] or partially displaced [ subluxated]

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SELAMAT DATANG

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  1. SELAMAT DATANG • Dr. SANTHOSH • ASSISTANT PROFESSOR • DEPARTMENT OF OPHTHALMOLOGY • K.M.C. MANIPAL

  2. Ectopia lentis • Displacement of the lens from its normal position • It is either completely displaced [dislocated ] or partially displaced [ subluxated] • May be inherited or acquired

  3. Definition : Partial displacement of the lens : Occurs when the zonules are torn in one segment : It still remains in the pupillary area : Displaced opposite. Causes Inherited Acquired Subluxation of lens

  4. Inherited Causes Marfan’s syndrome Weil Marchesani syndrome Homocystinuria Aniridia Hyperlysinemia Familial ectopia lentis Subluxation of lens

  5. Acquired Causes Trauma Large eye [myopia,buphthalmos] Hypermature cataract Subluxation of lens

  6. Symptoms : depends whether it’s anterior or posterior diplopia pain redness blurring of vision Indications for surgery : Diplopia : Lens induced uveitis : Secondary glaucoma Management : Leave alone if the patient is asymtomatic. : Removal of the lens with a vectis or ICCE Subluxation of lens

  7. Definition : complete displacement of the lens from the pupillary area. Types : anterior or posterior Symptoms: pain, redness, blurring of vision Signs: Depends on the type of dislocation Dislocation of lens

  8. Complications : Corneal endothelium touch Secondary glaucoma Vitreous haemorrhage Retinal tear Retinal detachment Chronic uveitis . Dislocation of lens

  9. Management In anterior dislocation – remove with a vectis using viscoelastics In posterior disclocation- Total vitrectomy and floating the lens using heavy liquids or using a fragmentome to break the nucleus and removing the pieces. Or leave alone if there are no complications. Spectacle correction [aphakic ] Dislocation of lens

  10. Removal of the lens with a cryoprobe

  11. Complicated cataract Secondary to primary ocular disease [Secondary to inflammatory or degenerative diseases] Anterior or posterior uveitis : A + PSC Acute congestive glaucoma : Glaucomflecken High myopia : Post lens opacities and PSC Hereditary retinal + vitreoretinal disorders: PSC

  12. Complicated cataract Secondary to primary ocular disease Secondary to inflammatory or degenerative diseases Anterior or posterior uveitis : A + PSC Acute congestive glaucoma : Glaucomflecken

  13. Questions • Defination of subluxation and dislocation • Causes for subluxation and dislocation • Signs/symptoms of subluxation and dislocation • Management of subluxation and dislocation • Signs and management of complicated cataract

  14. Foetal infection from maternal viremia Within 6/52 the virus can penetrate the lens capsule Nuclear cataract Virus can persist in the lens for 3 years postnatally Microphthalmos Retinopathy [salt and pepper appearance] Glaucoma RuebellaCataract

  15. Abnormalities of lens shape • Coloboma [ involves the iris and choroid] • Anterior lenticonus • Posterior lenticonus • Lentiglobus • Microphakia [ Diameter is smaller than normal eg. in Lowe’s syndrome ] • Microspherophakia[ + disc like in eg. Marfans syndrome ]

  16. Do you have any questions ?

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