“…The power profiles of the Air Optix Aqua Multifocal (Alcon Laboratories, USA) with low, medium and high addition, and the Focus Progressives were measured in a previous study [2]. The refractive power provided by those lenses was found to be dependent on the patient's pupil size, and contact lens design For example, due to Air Optix Low addition and Focus progressives power profiles, 3 mm pupil diameter is needed to reach distance correction with the former one, whereas 1.8 mm pupil diameter is needed to do distance correction with the later one.…”