a person who makes or sells eyeglasses and, usually, contact lenses, for remedying defects of vision in accordance with the prescriptions of ophthalmologists and optometrists.
2.
a maker or seller of optical glass and instruments.
Origin
1680-90; < Frenchopticien < Medieval Latinoptic(a) (see optics) + French-ien-ian
Certification signifies to customers and employers that an optician has a certain level of expertise.
British Dictionary definitions for optician
optician
/ɒpˈtɪʃən/
noun
1.
Also called optometrist. a general name used to refer to an ophthalmic optician, a person qualified to examine the eyes and prescribe and supply spectacles and contact lenses
a general name used to refer to a dispensing optician, a person who supplies and fits spectacle frames but is not qualified to prescribe lenses