Below the results of lab tests on resolution loss on a leading polycarbonate lens and a new RESOLUTION lens (-4.00 power lenses). The resolution maps show the relationship between measured resolution and the stress birefringence of a spectacle lens.

The images below were based on plots that showed the measured data points in terms of blur spot size as measured through a 50mm lens. 1 arcminute (1') is a typical specification for the visual acuity of human vision, the angular subtense of the smallest object that the well corrected eye can see. When measured with a 50mm lens, this corresponds to a blur spot size of 13 microns. The maps below overlay the resolution in terms of visual acuity (contours are interpolated). Anything greater than 1' is theoretically perceptible resolution loss; each higher number represents greater resolution loss.

Lab tests indicate that there is a direct correlation between increased stress/birefringence and the increased irregularity of the power of the stressed region of the lens and an even stronger correlation between increased stress birefringence and increased spot size (i.e. lower resolution). Because new RESOLUTION lenses are made using new technology which does not rely on injection molding, which introduces stress into the lens, high resolution is achieved throughout the lens area as the RESOLUTION lens (left) clearly demonstrates. Therefore, lens quality is optimum and far superior to other polycarbonate lenses. Click below for more lab test results.

Power Variation Lab Tests

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