This study was undertaken to evaluate the incidence of true manifest strabismus, the visual acuity at school screening and whether risk of failing screening is different in those discharged at first visit or followed up. The author reviewed 248 children under the age of 30 months who had been diagnosed as pseudo strabismus or no deviation. Initial concern for referral was predominantly suspected esotropia in 133 cases. Eighty-two were discharged at their first screening visit and 166 were given a follow-up appointment. It was found that the incidence of esotropia for those who were initially otherwise normal on the first screening visit is between 2.4 and 3.4%. There is no significant difference in the risk of failing vision screening between the general population and those screened by the orthoptist. Presence of positive family history contributed to the decision to offer follow-up appointments but there was no significant difference between those discharged or followed for those that later developed esotropia.
Conversion to strabismus and amblyopia
Reviewed by Fiona Rowe
Development of manifest strabismus and reduced visual acuity following initial normal orthoptic examination / pseudo strabismus under the age of 30 months.
CONTRIBUTOR
Fiona Rowe (Prof)
Institute of Population Health, University of Liverpool, UK.
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