{{tag>ddx retina}} 
====== Crytalline Retinopathy ======

==== Ocular Causes ====

  * Bietti crystalline dystrophy
  * Calcific drusen
  * Gyrate atrophy
  * Retinal telangiectasia

==== Systemic Causes ====

  * Primary hereditary hyperoxaluria
  * Cystinosis
  * Secondary oxalosis (due to CRF and hemodialysis) 
  * Sjogren-Larsson syndrome

==== Drug Induced ====

  * Tamoxifen (daily dose > 200 mg)
  * Canthaxanthine
  * Methoxyflurane anesthesia (secondary oxalosis)
  * Ethylene glycol ingestion 
  * Oxalate
  * Talc
  * Nitrofurantoin