By consuming the vitamin K, one can have a good eye sight, to vision through the complete darkness during the nighttime. So, it is necessary to add the fruits and vegetables rich in vitamin k to your diet. As vitamin K is mostly present on the leaves, you have to eat the leafy greens and green vegetables to get a good vision. Vitamin k supplements have to be taken twice or thrice a week. It is, however, better to take the food rich in vitamin K daily so that you can have a very good eyesight at night.