Optic disc tilt is caused by the posterior bulging of the wall of a highly myopic eye and the oblique entry of the optic nerve into the sphere, resulting in a posterior displacement of one side of the optic disc (mostly the temporal side), causing the optic disc to lose its normal slightly vertical oval shape and become a significant vertical (or lateral, oblique) oval shape, even like a dustpan, under the examining eye. Genetics has been identified as a major factor in optic disc tilt. The mode of inheritance is autosomal recessive, dominant and X-linked, with a high degree of genetic heterogeneity. In addition to heredity, acquired environment such as general health, living environment, personal habits, and prolonged close eye work can contribute to the increase of myopia. Prevention and treatment of eye diseases need to start from several aspects, among which attention to nutrition can also help to improve vision and prevent tilting of the optic disc. In the daily diet, foods that have a role in improving vision are: (1) foods rich in vitamin A Vitamin A is closely related to normal vision. If vitamin A is insufficient, the regeneration of retinal red matter is slow and incomplete, and the dark adaptation time is prolonged, causing night blindness in severe cases. If the vitamin A deficiency continues or is insufficient, dry eye disease will develop, which can become corneal softening and corneal ulcers, as well as corneal crepitations and Bitt’s spots. The best food sources of vitamin A are animal liver, cod liver oil, fish eggs, poultry eggs, etc. The vitamin A contained in vegetables such as carrots, spinach, amaranth, alfalfa, sweet potatoes, pumpkins, green peppers, etc. can be converted into vitamin A in the body. (2) Foods rich in vitamin C Vitamin C can weaken the damage of light and oxygen to the lens of the eye, thus delaying the occurrence of cataracts. Foods containing vitamin C include fresh vegetables and fruits such as persimmon pepper, tomato, lemon, kiwi and hawthorn. (3) Calcium Calcium is related to the composition of the eye, and calcium deficiency can lead to myopia. Adolescents are at the peak of growth, the need for calcium in the body relatively increased, if not pay attention to calcium supplementation, will not only affect bone development, but also make the developing eye wall – sclera elasticity is reduced, the lens internal pressure rises, resulting in the front and rear diameter of the eye elongated and lead to myopia. Foods that contain more calcium, mainly milk and its products, shellfish (shrimp), bone meal, beans and soy products, egg yolk and dark green vegetables, etc. (4) chromium lack of chromium prone to myopia, chromium can activate insulin, so that the pancreas to play the maximum biological effect, such as the human body chromium content is insufficient, it will make insulin regulation of blood sugar dysfunction, plasma osmolarity increased, resulting in the eye lens, atrial water osmolarity increased and refractive error, thus inducing myopia. Chromium is mostly found in brown rice, wheat bran, animal liver, grape juice, nuts are also rich in content. (5) Zinc Zinc deficiency can lead to visual impairment, zinc in the body is mainly distributed in the bones and blood. Zinc is also found in the corneal epidermis, iris, retina and lens. Zinc is involved in the substitution and transportation of vitamin A in the eye, maintaining the normal organization of the retinal pigment epithelium and maintaining normal visual function. Foods that contain more zinc include oysters, meat, liver, eggs, peanuts, wheat, beans, grains, etc. (6) pearl pearl contains more than 95% of calcium carbonate and a small amount of magnesium oxide, alumina and other minerals, and contains a variety of amino acids, such as leucine, methionine, alanine, glycine, glutamic acid, aspartic acid, etc., pearl taste sweet and salty cold, with pearl powder with lobster, amber, etc. into the “real pearl” point eyes can inhibit the formation of cataracts. formation. (7) kelp kelp contains iodine, but also contains 1/3 of mannitol, sun-dried kelp surface has a thick layer of “white cream”, it is mannitol in kelp, mannitol has diuretic effect, can reduce intraocular pressure, used to treat acute glaucoma has good effect. Other seaweeds such as wakame also contain mannitol, which can also be used as an auxiliary food for the treatment of acute glaucoma.