Rohto Refreshing Eyedrops Cool 40αEye drops are a way to give the important four nutrients directly to the eyes. Eye drops can improve fatigue, blurry vision, and other symptoms of eye fatigue. Encourage blood circulation is natural vitamin E which prompts the metabolism of eye cells, and improves tired eyes. In addition, sodium chondroitin sulfate protects the corneal surface of the eye, preventing eye diseases. Moreover, potassium L aspartic acid will heal fatigue due to oxygenation