Most patients are diagnosed by the age of 10 years and<unk> 's is more common in girls (60 percent of the cases) than boys (40 percent of the cases). A French study reports that this syndrome accounts for 1.9% of the population of strabismic patients, 53.5% of patients are female, is unilateral in 78% of cases, and the left eye (71.9%) is affected more frequently than the right. Around 10–20% of cases are familial; these are more likely to be bilateral than non-familial<unk> .<unk>  has no particular race predilection.
Duane syndrome
Larsen syndrome
Crandall syndrome
Burnside–Butler syndrome
Adams–Nance syndrome
Stimmler syndrome
Havana syndrome
Jeavons syndrome