Eye mask used in this study is a delicate dark colored cloth (black and blue) of fabric material, length -18.5 cm, width- 8.5cm, height- 30 millimeter filled with soft cushions like substance inside which cover both eyes and 2 elasticized strap that holds the mask on patients head which prevents incoming light away from patient's eyes and induces a state of pure darkness. The product detail of Eye mask was, model number-SM004 and was ordered from Amazon.Eye mask decreases the intensity of the light which enhances melatonin secretion (involve endocrine system). Additionally, eye mask helps to use of cognator subsystem as eye mask also helps to reduce visual perceptual processing.