Visual aid for improving sharp vision of person, has macular degeneration and color filter with band pass function has average wavelength of five hundred nanometer and half width of less than fifty nanometer
摘要
<p>The visual aid has macular degeneration and a color filter (22) is arranged on an eye (10) of the person (12). The color filter has a band pass function with an average wavelength of 500 nanometer and a half width of less than 50 nanometer. The color filter is part of eyeglasses (18). The filter has a phototrophic film.</p>
