Su Y, et al. - Authors evaluated the clinical characteristics of delayed paediatric patients, especially those with different levels of ocular motility restriction prior to the surgery. In children, the main problems of delayed trapdoor fracture were long recovery time and a high percentage of persistent diplopia. Experts strongly recommended a prompt surgery within 48-hours in patients with muscular entrapment even if achievement of an urgent treatment was hard. So are patients with soft-tissue entrapment and significant motility restriction. Regardless of the entrapped contents, a prompt surgery right after diagnosis was still preferable in the other patients without such indications, even though there could be a possibility of some recovery in the long term.