| 摘要 |
<p>A pair of prescription auxiliary lenses adapted to be releasably attached to a pair of spectacles. The pair of spectacles have a pair of main lenses each of which is a progressive, prescription lens having an upper portion of a first focal length for distance viewing, a central portion of a second focal length for intermediate viewing, and a lower portion of a third focal length for reading viewing; the pair of auxiliary lenses being for overlaying and changing the focal length of the upper portion to that of the central portion. A method for managing myopia is also disclosed including determining a general prescription required for eyesight correction, determining a required prescription for intermediate zone work, determining a change prescription for auxiliary lenses to change the general prescription to the required prescription, and providing auxiliary lenses of the change prescription. The auxiliary lenses are adapted to be fitted to a pair of spectacles having lenses of the general prescription to change the general prescription to the required prescription whenever work is to be conducted in an intermediate zone.</p> |
