This article is more than 5 years old. Information may no longer be current.
Exotropia increasing in Hong Kong, study finds
Click Here to Manage Email Alerts
HONG KONG — Exotropia is more prevalent than esotropia here, and the proportion of patients with intermittent exotropia appears to be increasing, according to a large, long-term study of Hong Kong Chinese patients.
Researchers with the Hong Kong Eye Hospital retrospectively reviewed the charts of 2,704 patients who were diagnosed with primary horizontal strabismus during the past decade. Of the patients, 742 had esotropia, 548 had constant exotropia, 1,213 had intermittent exotropia and 201 had microtropia. The proportion of exotropic to esotropic patients increased steadily during the past decade (P < .0001). This was primarily due, the researchers said, to an increase in the number of patients with intermittent exotropia and a corresponding decrease in the number of patients with esotropia.
The study is published in the August issue of British Journal of Ophthalmology.