Hello everyone I use this product regulary its made with pure herbal no artificel or chemical things use in this yes its not as good as others but really its very good for your eyes its take care of ur eyes and keep healthy its also enhance your eyes beauty its indian product so we purches it in very low cost yes we just spend low cost for herbal or good product I m very much happy will using this product in compering other product it’s slightly or might be not pure black then also its good because in others product the company use artifical colours to enhance the darkness and blackness which may be react or damage or eyes so many differet type of dises also we face like night blindness , blindness, etc. so for our sensitive organs I think we use only hebal products if we not got the best then also we not loss our sensetive organs .