An eye-mountable device includes an electrochemical sensor embedded in a polymeric material configured for mounting to a surface of an eye. A successive approximation is performed. Particularly, when the light-emitting device is a light-emitting diode, the emissive layer thereof is a quantum dot emissive layer for effectively improving color saturation of the light-emitting diode and enhancing color displaying performance of the light-emitting diode. The silt fencing material may be used to form a pocket for sand, thus forming a sandbag at the base of the panel for controlling water flow. In further embodiments, the method outputs the mask pattern as a mask dataset. The diamine component is added while maintaining the whole reaction system in fluid state under pressure.