THE mother of a boy who sustained brain injuries in a road accident has filed a writ with the Supreme Court, seeking damages from Kowloon Motor Bus and its driver. The writ, filed by Wong Miu-yee, contends that the accident, which has left her son Lai Wing-hong, now 10, with impaired sight and hearing, was due to the negligence of driver Chung Kam-wing. According to the writ, the accident occurred on February 20, 1991, when the boy was on his way to school. He was at the safety island on a pedestrian crossing when he was struck by the bus, travelling along Shanghai Street, it is claimed. The boy was taken to hospital in a coma and was found to be suffering from a brain haemorrhage. He was discharged on August 8, 1991, and it is the plaintiff's case that he still suffers impaired hearing, sight and intelligence. The writ says he resumed his schooling in February last year, but was unable to cope with the work and had to repeat Primary Two.