Yes, it is true that vitamin deficiency will cause red eyes because the eyes do not get the moisture role. As we know, the spinach, vegetable, leek, green peppers, cucumber, pakchoi, broccoli and cauliflower with fresh jujubes all contain the vitamin C which could make your eyes get moisture and make your eyes get bright. In addition, the vitamin A could also improve your night vision. Once your eyes are dry, the main symptom of it is redness. Your eyes will feel itchy, causing other eyes infection. If you lack the vitamin C, you will have high possibility to get redness of the eyes. You could use some eye drops to release the red eyes. You could also use the warm compress to make the eyes feel comfortable. The redness of the eyes should not be ignored. Or else, your eyes will meet bigger problems.