Eye  is  very special organ of our body because without it we would not be able to see  the nature although we take all given faculties for granted but  still sight have its own specific value.We must protect our eyes from pollutants basically our sight(eyes) are totally dependent on our intake of vitamin-A therefore  we should increase our intake of vitamin-A upto the recommended requirement.Vitamin-A is chemically known as 'retinol' this  is because it helps in regulating the  functions of eye.But at the same time we should remember that 'Excess of every thing is bad'.