Dowaliby, M Comparative study involving bitoric effect of hard resin lenses mounted in optyl frames, zylonite frames, and metal frames. [electronic resource] - American journal of optometry and physiological optics Feb 1980 - 109-12 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0093-7002 Standard No.: 10.1097/00006324-198002000-00006 doi Subjects--Topical Terms: Eyeglasses--standardsHumansPlastics--standardsPressure--adverse effects