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Progressive addition lenses (PALs) date back to 1907, when the first patent was given to Owen Aves Opticians. While early PALs were rudimentary in design, they have improved significantly over the ...
Results from the ECP's survey showed reactions that were similar to the patients', with high satisfaction with the water gradient DDMF, as follows: 100% felt the lenses were easy and efficient to fit, ...
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