摘要:
Progressive lens for viewing a field of vision having at least a first portion including objects in a first range of distances from a viewer and a second portion including objects in a second range of distances from the viewer, the lens comprising: at least two different power zones, the first power zone having lens power required by the viewer for the first range of distances of viewed objects from the viewer, and the second power zone having lens power required by the viewer for the second range of distances of viewed objects from the viewer, wherein the size and location on the lens of the first power zone correspond to size and location in the field of vision of the first portion, and wherein the size and location on the lens of the second power zone correspond to size and location in said field of vision of the second portion.
摘要:
A device and method for verifying the fitting of ophthalmic lenses in a frame for spectacles, the device comprising a mask to be placed on at least one lens of the spectacles, the mask having at least one transparent stain within an opaque area of the mask, the stain located correspondingly to a test point on the lens. The method comprising placing a mask on at least one lens installed in the spectacle's frame, the mask having at least one transparent stain within an opaque area of the mask, the stain located correspondingly to a test point on the lens. Additionally, a system and method for optometric measurements by using the described mask are also provided.
摘要:
A device and method for measuring the pantoscopic tilt of a lens installed in a frame, the device comprising an orientation sensor for measuring pantoscopic tilt and an attachment member to attach the device to a lens. The method comprises marking a center of the pupil on a lens while a patient is wearing the spectacles, attaching a measurement device at the marked center of the pupil point and while the device is attached to the lens, reading the pantoscopic tilt value from the device while the patient is wearing the spectacles in a natural position of the head for looking at the horizon.