An emitter-detector pair sensor may be incorporated into a powered or electronic ophthalmic lens. The emitter-detector pair sensor may be configured to determine the distance from the sensor to an object in its path. Based upon this information, a system controller of the ophthalmic lens may output a signal to an actuator of the ophthalmic lens to control a variable power optic of the ophthalmic lens.一發射器偵測器對感測器可結合至一供電或電子眼用鏡片中。該發射器偵測器對感測器可配置用來測定該感測器至其路徑中之一物體的距離。根據此資訊,該眼用鏡片之一系統控制器可輸出一訊號至該眼用鏡片之一致動器,以控制該眼用鏡片之一可變焦度光學件。100‧‧‧隱形眼鏡101‧‧‧環境光102‧‧‧光感測器103‧‧‧電流104‧‧‧放大器106‧‧‧ADC108‧‧‧微處理器110‧‧‧電源112‧‧‧致動器114‧‧‧系統控制器
