Progressive Powered Lenses: the Minkwitz Theorem
@article{Sheedy2005ProgressivePL, title={Progressive Powered Lenses: the Minkwitz Theorem}, author={James E. Sheedy and Charles E. Campbell and Ewen King-Smith and John R. Hayes}, journal={Optometry and Vision Science}, year={2005}, volume={82}, pages={916-922} }
PURPOSE
The Minkwitz theorem, which can be proven to apply to the immediate surface surrounding a line of umbilics, states that astigmatism perpendicular to the line changes twice as quickly as the rate of change of power along the line. [] Key Method Lenses were measured with a Rotlex Class Plus lens analyzer.
RESULTS
Zone widths in the central region of the Tact lenses exceeded those predicted by the Minkwitz theorem. Above and below this region, zone widths were narrower than predicted. When averaged…
76 Citations
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The three measurement methods are comparable for measuring spherical and cylindrical power across PALs and the non-optical method, CMM, can be used to evaluate the optical properties of a PAL by measuring front and back surface height measurements, although its estimates of HOAs are lower than those from the HSWFS.
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This nonoptical method using a coordinate measuring machine can be used to evaluate a PAL by surface height measurements, with the optical properties directly related to its front and back surface designs.
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Over the past few decades, progressive addition lenses (PALs) have emerged as an effective correction strategy for presbyopic patients. PALs offer a cosmetic and optical advantage to traditional…
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A simple analytical model is proposed that confirms that for typical pupil sizes, all higher-order aberrations, including the dominant modes of coma and trefoil, are small enough to render an undisturbed vision in the progression zone.
Proposta para uma viso clnica das lentes progressivas
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The study of the progressive addition lens (PAL) under the physiological optics' view concludes that the dioptric values are the principal factor and, the progressive zone secondary and the aa.
Optical performance of progressive addition lenses (PALs) with astigmatic prescription
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Significant impacts of astigmatic prescription are revealed, providing evidence for the usefulness of four novel optical metrics sensitive to variation of refractive power across the lens surface of PALs in quantifying the optical performance of Pals for patients with astigmatic prescriptions.
Measurement and Comparison of Progressive Addition Lenses by Three Techniques
- Physics
- 2011
Purpose. To measure and evaluate variations
in spherical power, astigmatism and higher-order aberrations (HOAs)
in progressive addition lenses (PALs) by three techniques and to
compare their…
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