Till Burkert,Julian Charles Nolan,Matthew John Lawrenson,Lars Andersson
申请号：
US14770380
公开号：
US09971170B2
申请日:
2015.06.30
申请国别(地区):
US
年份:
2018
代理人:
摘要：
A device for controlling a lens for adjustable vision correction is provided. The device, e.g., a smartphone, comprises circuits to determine if a user of the device is gazing at the device, and, if the user is gazing at the device, to determine a distance between the eye and the device, and to control the lens to adjust its focal length based on the determined distance. Thereby, the lens is adjusted only if required, i.e., if the user is gazing at the device. The circuits may be suitable for correcting presbyopia if the user is gazing at a device located at close distance, and alleviate the need for the user to actively operate a switch or move her head for adjusting the focal length of her lenses.
