Comfortable Heating Massage - Renpho's eye massager built-in heating pads provide a comfortable temperature between 104 and 107 degrees Fahrenheit(40℃-42℃), better for relaxing eye puffiness, dry eyes, etc. A hot compress can regulate the metabolism of the eyes, more effectively improve symptoms such as dry eyes, and reduce dark circles. Note 1: We do not recommend customers use eye machines if you have undergone eye operation, retina condition, cataract, glaucoma etc.