Patent ID: 10921612

Abstract:
Presbyopia treatment and anti-myopia spectacles comprise a negative refractive element facing an object and a positive refractive element facing a patient eye. The negative refractive element has a central zone with a strong negative refractive power. The positive refractive element has a central zone with a less strong positive refractive power. The front focal point of the central zone of the positive lens does not have to overlap with the front focal point of the central zone of the negative lens. The negative refractive element and the positive refractive element are axially separated by a relatively small distance such that the combination of the two refractive elements is compact enough to be made into an easily wearable spectacle. For myopia progression control, at least one portion of the paracentral and/or peripheral zone of at least one of the two refractive elements has a relative add power with respect to that of the central zone such that the image of an off-axis distant or intermediate object is formed in front of a corresponding paracentral or peripheral retina area to create myopic defocus on the corresponding retina area.