method for selecting an optical material of the fail-safe electro-active lens and fail-safe electro-active lens

摘要

We suggest The present invention fail-safe electro-active lens. A This lens includes a substrate having a diffraction relief surface, and the electroactive material that has passed through the substrate and the optically communicated. Electroactive lens may include a nematic liquid crystal host. At a wavelength in the blue light spectrum, the refractive index of the substrate is equal to the average refractive index of the liquid crystal.BACKGROUND 10