Fowler, C W A comparison of three methods for the measurement of progressive addition lenses. [electronic resource] - Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) Jan 1989 - 81-5 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0275-5408 Standard No.: 10.1111/j.1475-1313.1989.tb00813.x doi Subjects--Topical Terms: EyeglassesMethodsOptics and Photonics