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Cone Dystrophy

What is cone dystrophy?

Cone dystrophy is an umbrella term for a group of disorders that impact the retina’s cone cells. The two major forms of this condition are progressive cone dystrophy and stationary cone dystrophy. The former means that symptoms slowly worsen over time, while the latter sees stable symptoms that present at birth or during childhood. 

What are the symptoms of cone dystrophy?

Symptoms can vary between affected individuals depending on type, age of onset, and severity. Possible symptoms include:

  • Decreased visual acuity
  • Lessened ability to see colors
  • Photophobia
  • Nystagmus
  • Legal blindness

What causes cone dystrophy?

The majority of cases of cone dystrophy are the result of a sporadic mutation, although other forms are passed down in either autosomal dominant, autosomal recessive, or X-linked patterns. The specific gene that is mutated depends on the type of cone dystrophy one has. 

How is cone dystrophy diagnosed?

A diagnosis often comes after doctors recognize the characteristic symptoms, evaluate family history, and perform a clinical evaluation. This evaluation should include ophthalmological exams, and the final diagnosis should be confirmed through an electroretinogram (ERG).

What are the treatments for cone dystrophy?

There is no cure for this condition; treatment is symptomatic. 

Where can I find out more about cone dystrophy?

Cone Dystrophy Articles