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KMID : 1011420100150040355
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Journal of Korean Ophthalmic Optics Society
2010 Volume.15 No. 4 p.355 ~ p.360
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The Performance Analysis and Designof Selling Spectacle Lenses in Domestic Market
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Kim Se-Jin
Lim Hyeon-Seon
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Abstract
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Purpose: Analysis performance for spectacle lens which sales in domestic market and optimization design a spectacle lens which is corrected aberration.
Methods: Measured center thickness, radius and aspherical surface coefficient for spherical and aspherical lenses which were ?5.00D. Refractive index for every lens was 1.6 and they came from 4 different companies. I used 3 types of equipment to measure lenses. ID-F150 (Mitutoyo): Center Thickness, FOCOVISION (SR-2, Automation Robotics):Radius, PGI 1240S (Taylor Hobson):Aspherical surface coefficient. Designed a lens which had 27 mm of distance from lens rear surface to center of eye, 4 mm of pupil diameter and small aberration on center vision 30oC. To shorten axial distance compared with the measured lens rise merits for cosmetic. Lens Design tool was CODE V (Optical Research Associates).
Results: -5.00D aspherical lens had somewhat high astigmatism and distortion compared with the spherical lens. But it had a merit for cosmetic because of short axial height and decrease edge thickness. Improved a performance of distortion and ascertain merits for cosmetic due to short axial height and decrease edge thickness same as (-) lens in case of +5.00 aspherical lens. Though an optimization process front surface aspherical lens had a good performance for astigmatism and distortion and the merit for beauty compared with measured spherical lens.
Conclusions: Design trend for domestic aspherical lens is decrease axial height and thickness to increase a merit for cosmetic not but increase performance of aberration. From design theory for optimization design front surface aspherical spectacle lens which has improved performance of aberration and merit for cosmetic at the same time compared with the measured lens. Expect an improved performance from design back aspherical lens compared with front aspherical lens.
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KEYWORD
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Spectacle Lens, Astigmatism, Distortion, Aspherical Lens
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