How do Varilux lenses reduce horizontal head movement?
Varilux progressive addition lenses require fewer changes in the wearer’s horizontal head and eye movements.
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For example, a non-presbyope looking at an object at intermediate (arms-length) distance, located at a 25º angle from straight ahead vision, can reach it by simply turning the eyes without moving the head.A wearer of non-Varilux progressives (as shown on the left) is only able to turn the eyes by about 13º and the head by an additional 12º to reach the same object. Thus, non-Varilux progressives require significant horizontal head movements. |
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With Varilux, head movements are reduced to 6º – only half as much – while the eyes are able to turn 19º. The very gradual and regular distribution of power characteristics in the periphery of the Varilux lens allows for very comfortable vision in a lateral, side-to-side gaze. The Varilux wearer enjoys larger fields of vision with less head movement. |
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