title: Field study of a new progressive addition lens.
mesh_terms: D000328:Adult; D003258:Consumer Behavior; D005069:Evaluation Studies as Topic; D005139:Eyeglasses; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D055095:Optics and Photonics; D011305:Presbyopia / Q000534:rehabilitation*