Tomatoes contain lycopene and carotenoids which make fruits come in brilliant red. Researches show that lycopene in eye tissues helps to prevent the risks caused by light to the retina and other parts of the eye. Tomato also provides a great source of vitamin C to protect eyesight. Processed tomatoes or fresh tomatoes served with a little olive oil can help to promote the absorption of lycopene. The researchers suggest that eating foods rich in antioxidants would be better than taking supplements for the eye. Carrots are also an excellent source of this substance.