Leber congenital amaurosis 9

Synonyms

Amaurosis congenita of Leber, type 9, Leber congenital amaurosis type 9,

Overview

Leber congenital amaurosis 9 (LCA9) is a rare inherited retinal disease (retinal dystrophy) that starts during the fetal stage. Vision impairment is obvious at birth or within months of birth. Type 9 is distinguished from the other forms of this condition by the genetic origin of the defect – chromosome 1p36.

Symptoms

  • Retinal dysfunction
  • Nystagmus
  • Blindness
  • Sensitivity to light
  • Impaired vision

Causes

  • Alcohol
  • Trauma
  • Multiple sclerosis
  • Congenital
  • Vertigo
  • Acute labyrinthitis
  • Medications
  • Stroke
  • Brain tumour
  • Meniere’s disease
  • Pituitary tumour
  • Encephalitis
  • Eye injury
  • Eye artery obstruction – this cause and other causes are a medical emergency
  • Retinal artery obstruction
  • Retinal vein obstruction
  • Eye blood vessel thrombosis
  • Temporal arteritis
  • Retinal detachment
  • Amaurosis fugax
  • Stroke