Coats disease is a rare disease of the eye that can progress to vision loss and blindness. In this condition, abnormal blood vessels in the retina of the eye become dilated and leak fluid. It tends to affect males more than females and to appear at about 8-10 years of age.

The most common symptom associated with Coats disease is vision loss in one eye. Other symptoms and signs can include the

perception of flashing lights or
floaters in one eye.

The vision loss is usually gradual. While Coats disease is painless, the fluid buildup due to the leaky blood vessel can cause increased pressure (glaucoma) to occur, which may cause pain late in the disease course. Other signs include

eye wandering,
resulting in misaligned eyes (strabismus), and a
white, gray, or pinkish reflection from the pupil (leukocoria) that are visible in photographs taken with a flash.

Cause of Coats disease

The exact cause of the condition is not known.

Other coats disease symptoms and signs

Eye Wandering
Floaters in one Eye
Gradual Vision Loss
Perception of Flashing Lights
Resulting in Misaligned Eyes (Strabismus)
White, Gray, or Pinkish Reflection From the Pupil (Leukocoria) That Are Visible in Photographs Taken With a Flash