An optician is an eye care professional who provies corrective lenses based on a refraction prescription supplied by a ophthalmologist or optometrist. The lenses may be contact lenses, spectacles lenses, low vision aids or ophthalmic prosthetics. The corrective lenses are mounted either on the eye as contact lenses or mounted in a frame or holder in front of the eye as spectacles or as a monocle. The term "optician" is also used to refer to retailers providing the above services.