Abstract: A pair of sunglasses with farsighted lenses includes a main body having a frame surrounding two separate areas. Each of the areas is occupied by a sunlight glass having an opening cut at its lower and inner part. The opening is to be filled with a farsighted lens provided with a fixing groove around its circumference for fitting with the circumferential edge of the opening.

Abstract: A pair of sunglasses with farsighted lenses includes a main body having a frame surrounding two separate areas. Each of the areas is occupied by a sunlight glass having an opening cut at its lower and inner part. The opening is to be filled with a farsighted lens provided with a fixing groove around its circumference for fitting with the circumferential edge of the opening.

Abstract: A detecting device for a cycle includes a sprocket rotatably secured on a shaft, the shaft has an actuator for actuating the sprocket to rotate relative to the shaft. A device may be used for detecting the angular displacement between the shaft and the sprocket, in order to obtain or to calculate the power and the energy and the torque required to rotate the shaft and to drive the cycle. The motor device for driving the cycle may be actuated with less energy while moving down hill. A greater energy may be applied to the motor device while climbing up the hill.