Filter for a special purpose lens and method of making filter

Details Filter for a special purpose lens and method of making filter Filter for a special purpose lens and method of making filter

1998-11-20

2000-10-17

Mai, Huy

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

359586, G02C 710

Patent

active

061320447

ABSTRACT:
A filter and method for making a filter for enhancing a person's ability to differentiate between different shades of a spectral color of interest involves obtaining spectral data for the different shades and plotting the data on a chromaticity diagram. The standard deviation of the data is determined and a merit function based on the standard deviation is developed. Filters having positive merit functions are deemed appropriate candidates for the special purpose lens.

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