Attendance for the investigation and evaluation of a patient for the fitting of contact lenses, with keratometry and testing with trial lenses and the issue of a prescription-one service in any period of 36 months-patient with a medical or optical condition (other than myopia, hyperopia, astigmatism, anisometropia or a condition to which item 10806, 10807 or 10808 applies) requiring the use of a contact lens for correction, if the condition is specified on the patient's account