Visual equipment for checking close vision working distance
First Claim
1. A spectacle system comprising:
- an optical system having at least one corrective lens through which a wearer of the spectacle frame views objects, wherein the optical system has a fixed optical power with respect to time; and
a telemetry device attachable to the optical system to determine the distance between the optical system and a viewed object.
1 Assignment
0 Petitions
Accused Products
Abstract
There is provided a spectacle frame 1, having a least one corrective lens the characteristics of which do not vary over time and having telemetry means 5 which set off an alarm 9, 10 when the distance measured by the telemetry means is less than a predetermined preference distance. This reference distance can for example be set at between 20 and 50 cm depending on the spectacle wearer. A kit is also provided comprising a frame, telemetry means and an alarm. The spectacle frame can be prescribed for slowing down the evolution of acquired myopia in children who are starting to acquire myopia; here, the spectacle frame is provided with progressive multifocal lenses. The telemetry means and alarm incite the child to respect a sufficient working distance for close vision.
124 Citations
27 Claims
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1. A spectacle system comprising:
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an optical system having at least one corrective lens through which a wearer of the spectacle frame views objects, wherein the optical system has a fixed optical power with respect to time; and
a telemetry device attachable to the optical system to determine the distance between the optical system and a viewed object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A kit comprising
a spectacle system comprising an optical system including at least one colTective lens through which a wearer of the spectacle system views objects; -
a telemetry device attachable to the spectacle system; and
an alarm set off by said telemetry device when a distance measured by the telemetry device is less than a predetermined reference distance. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification