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Study: Simple congenital ptosis most prominent form of ptosis in childhood cases
Ophthalmology. 2011;118(6):1180-1183.
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Nearly eight out of every 100,000 children younger than 19 years have childhood ptosis, according to a study, with 76% of those cases being the simple congenital form.
The left eye was involved more often than the right eye, and more boys than girls were affected in this population-based cohort study that retrospectively reviewed medical records of 107 children with ptosis in Olmsted County, Minn., over a 40-year period.
Of the 107 children studied, 96 had congenital onset of the disease. Of those 96 cases, 81 were diagnosed as simple congenital ptosis. Initial diagnosis of simple congenital ptosis was made at a median age of 1.3 years.
Of the simple congenital cases, 55 unilateral cases involved the left eyelid. Predominance of left eyelid involvement has been reported previously, the study authors said, as has the relatively rare incidence of other forms of childhood ptosis.
The authors suggested that limitations of the study may result in an underestimation of the true incidence of childhood ptosis.