The purpose of this study was to analyse the surgical outcome of strabismus surgery in patients with unilateral visual loss and horizontal strabismus. This was a retrospective review of 21 patients. Nine children were reviewed with a mean age of 10.2 ±1.7 years and 12 adults with a mean age of 41.9 ±4.8 years. Mean preoperative logMAR visual acuity in the deviating eye was 1.4 ±0.7. Mean follow-up was 20 months. The most common cause of visual loss was amblyopia followed by congenital cataract. Thirty-eight percent were esotropic and 62% exotropic. All underwent unilateral strabismus surgery with a successful outcome in 89% of children and 75% of adults.