This is an extremely rare syndrome, first reported in 1959, consisting solely of changes in the retina of the eye.
Only the retina seems to be involved in this condition and only a few families have been reported. Spots of various size and pigmentation changes are seen in the eye. Some degree of night blindness is often present but this seems to be mild and stationary.
Nothing is known about the genetics of this disorder.
This condition can only be diagnosed by an ophthalmologist.