All professional attendances after the first, being those attendances regarded as a single service, in a single course of attention involving the prescription and fitting of contact lenses, for patients for whom a wholly or segmentally opaque contact lens is prescribed for the alleviation of dazzle, distortion or diplopia caused by any of the following:(a) pathological mydriasis;(b) aniridia;(c) coloboma of the iris;(d) pupillary malformation or distortion;(e) significant ocular deformity; or(f) corneal opacity;whether congenital, traumatic or surgical in origin being a course of attention for which the first attendance is a service to which item 10905, 10907, 10910, 10911, 10913, 10914, 10915 or 10916 appliesApplicable once in a period of 36 months