optician man checking a pair of eyeglasses

acuity anti astigmatism bifocal care corrective crystal diopters dispensing distance eye eyeglasses eyesight eyestrain farsightedness glasses health healthcare horizontal job lenses long man myopia myopic nearsightedness object oculist optical optician optics optometrist optometry person practitioner profession professional progressive reading reflective see short shortness sight sightedness spectacles vision visual work young