Ophthalmologymiddle twist
A 4-year-old boy is screened at his preschool in Sydney under the state vision screening programme. Using a matching-letter chart he scores 6/9 in the left eye and 6/9 minus three letters in the right. Cover testing shows no manifest deviation and the corneal light reflexes are symmetrical. He was born at term, is developing normally, and his parents have noticed nothing wrong with his eyes. His grandmother wore a patch as a child. Which one of the following should the screening programme now arrange for him?