"Hospital feedback"

My appointment was for 3.10pm and I left the clinic at 5.00pm other patients were still waiting to be seen The visual fields staff and the clerical staff had left so no appointments could be booked.Therefore letters will need to be sent out resulting in more administration work and possible cancellations as the appointments may not be convenient. Whenever I have visited the eye clinic I have had a long wait the longest appointment time 1.30pm left clinic at 4.50pm .It is unacceptable and needs investigating to why these delays continue. Are too many patients booked in ? A time and motion study would be a good idea