Taking vitamin D does not have any significant health benefits for eye health. When vitamin D intake is insufficient, proper supplementation is beneficial to the health of the eye axis and retina. Vitamin D is an indispensable nutrient for the body to maintain normal function and growth and development. Vitamin D can play a role in promoting calcium absorption, etc. Vitamin D deficiency is most likely to affect bone development, resulting in rickets. However, supplementing with vitamin D will not improve the health of your eyes. And excessive supplementation of vitamin D is not conducive to good health, because vitamin D is a fat-soluble vitamin, excessive supplementation can not be metabolized out of the body in a short period of time, it will accumulate in the body. When the intake of vitamin D is insufficient, appropriate supplementation is beneficial to the health of the eye axis and retina. Therefore, if patients want to supplement vitamin D, they must do it reasonably under the guidance of doctors.