Corneal ulcer is epithelial defect with underlying inflammation on the cornea or open sore. The cornea is the clear structure in the front of your eye. Iris is the colored part of the eye. The cornea overlies the iris. Cornea is separated from the iris by the aqueous fluid in the anterior chamber of the eye. The corneal ulcer will often appear as a gray or white opaque or translucent area on the normally clear and transparent area. In the most cases corneal ulcers are caused by bacterial infections. They can cause corneal ulcers and they are very common in people who wear lenses . There are some studies in which are shown that the bacteria can directly invade the cornea if the corneal surface has been disrupted. There are some bacteria which are producing toxins that can cause ulceration of the cornea. Also fungal infections can cause corneal ulcers and they can happen with the improper care of the contact lenses or with overuse of eye drops that have steroids. There are some parasites like Acanthamoeba which could lead to corneal ulcers. There are some viruses which can cause corneal ulcer such as the Varicella virua (the virus that causes both shingles and chickenpox) and herpes simplex virus (the virus that causes cold sores). Also tiny scratches or tiny cuts in the corneal surface can become infected and they can lead to corneal ulcers. For example, glass, wood or metal, or almost any type of particle which strikes the cornea can cause minor trauma. Talk with your doctor if you suffer from corneal ulcer before you start using some of the below mentioned home remedies. Your doctor needs to know the cause of your corneal ulcers and the natural treatment of this condition is depending on the cause for it. 
Corneal ulcer home remedy
Tea tree oil: This is a powerful essential oil and when it is applied on the eyelid and around the eye, then it can help in the fight against the parasitic eye infection. You should keep in your mind that this type of home remedy should not be placed in the eye. Scientists are saying that when tea tree oil is used around the eye, then it can be seen improvement in the inflammation, vision and tear production and they have said that the recurrence of a parasitic infection of the eye was rare. 
Eye care: During your healing process of corneal ulcers, you need to wear sunglasses and you should avoid unnecessary eye strain. Also you should use a moist warm compress on the eyes because this will give comfort and it will fight against the infection. You should mix three cups of very warm water with ten drops of oregano oil and soak a clean washcloth in it. You should ring well and then place the washcloth over the eyes for twenty minutes.
Corneal ulcer treatment
Colloidal silver: There are some studies in which are said that the colloidal silver can kill germs by binding the germs and then it is destroying them . When you put a couple of drops in your eyes of colloidal silver, then it can kill some types of infections. This home remedy is generally considered as safe but it can interact with certain tetracycline antibiotics, quinolone antibiotics, penicillamine and the popular hypothyroidism drug levothyroxine should be avoided. Before you start using colloidal silver as your natural treatment for the corneal ulcer, you need to talk with your doctor if it is suitable for you and for the correct dosage .
L – Lysine: You should take 1000 mg, 3 times a day of this home remedy when you are fighting against a viral infection. There are some studies in which are shown that the L – Lysine (it is an essential amino acid) can help to fight and prevent recurrent viral infections [6,7]. Also you should include foods that have L – Lysine such as eggs, pumpkin seeds, white beans, wild tuna, lamb, grass – fed beef and parmesan cheese to your diet. If you want to have a healthy and easy lunch or light dinner which can help you in the fight against the corneal ulcer, then you should make tuna pasta salad which has brown rice pasta and wild – caught tuna.
Echinacea: When you suffer from corneal ulcer that is caused by an infection, then you should take 500 mg of Echinacea, 3 times per day. There are some studies in which are proven that this home remedy can help to fight the bacteria and viruses and at the same time it enhances immune system function . This home remedy is generally considered as safe but if you are taking immunosuppresants or econazole which is a popular antifungal medication, then you should avoid taking Echinacea supplements. Also this home remedy can increase the amount of time it takes the body to break down caffeine, so this is a reason why you should avoid taking caffeine.
Zinc: When you are fighting against an infection, then you should take 50 mg of zinc every day. It has antioxidant properties which can lessen the inflammation and improve the immune system response. Also this mineral is very recommended for people who have a risk of developing ARED (Age Related Eye Disease). You should consume foods that are rich in zinc such as cocoa powder, garbanzo beans, grass – fed beef, pumpkin seeds and lamb.
Vitamin C: You should take 1000 mg of Vitamin C, 3 times a day while you are fighting against an infection because this can help to boost your immune system response. This vitamin can boost the immunity but also it can improve the vision for people who have an inflammation of the eye and it can protect against the macular degeneration . Also you should include foods that are rich in Vitamin C sin your diet such as citrus fruits, kiwi, red bell peppers, black currants and guava. You should enjoy in your morning eating strawberry kiwi smoothie because this will provide a boost of protein because of the yogurt and at the same time kiwi is a great source of Vitamin C.
Dietary changes: You should change your diet when you are fighting an infection, particularly a fungal infection because this is the key for your healing. If you are diagnosed with a fungal infection, then it is very important to remove the yeast and other fungi from your diet and you should follow a candida diet which will be prescribed by your doctor. You should focus on eating probiotic – rich foods like sauerkraut, kefir and yogurt and you should boost your intake of fats, protein and fiber.
Vitamin D: It is known fact that when someone is fighting against any type of infection, then he or she needs to increase the Vitamin D levels in his/her body. People, who have a corneal abrasion or eye injury and who have Vitamin D deficiency, can be more prone to developing an infection. You should take high – quality Vitamin D3 supplement after you have talked with your doctor for the correct dosage. You should try to get a minimum of ten to fifteen minutes each day of direct sunlight, without sunscreen. You should wear sunglasses to protect your injured eyes and you should focus on consuming foods that are rich in Vitamin D such as salmon, eel, mackerel and halibut (these are wild fishes that are rich in Vitamin D). Also there are many studies in which are shown that the Vitamin D can improve the immune system response, concentration and mood .
Vitamin A: There are many studies in which are said that boosting the intake of Vitamin A while you are fighting an eye problem is very important and this home remedy is ranged at the top of the list for eye and vision health. It can reduce the inflammation. Also it can improve the neurological function and it can fight against the damage that is caused by free radicals. Also it can fight against the poor eye health which is linked to Vitamin A deficiency. You should eat foods that are rich in Vitamin A because in this way you will boost this vitamin in your body. When you eat three ounces of beef liver, then this will provide you with 3 times amount of Vitamin A for the daily recommended value. If you do not want to eat the beef liver, then you can swap it with bell peppers, romaine lettuce, raw carrots and sweet potatoes. If you have decided to take Vitamin A supplement, then you should remember that this vitamin is fat soluble and you should take it with healthy fat for the best absorption. If you suffer from chronic dry eyes, then you should choose natural eye drops which have a combination of Vitamin A, Vitamin C and Vitamin E as well as selenium and zinc. They will give you a relief from your condition but also they can help you a lot in the natural treatment of corneal ulcers.
 Khuu T, Denial A. Contact lens – related corneal ulcer: A teaching case report. Optometric Education. 2011;37(1):44-52.
 Asroruddin M, Nora RLD, Edwar L, et al. Various factors affecting the bacterial corneal ulcer healing: a 4-years study in referral tertiary eye hospital in Indonesia. Medical Journal of Indonesia. 2015;24(3).
 Hadas E, Derda M, Cholewinski M. Evaluation of the effectiveness of tea tree oil in treatment of Acanthamoeba infection. Parasitology Research. 2017;116(3):997-1001.
 Iroha IR, Esimone CO, Orji JO, Imomoh OO. Antibacterial efficacy of colloidal silver alone and in combination with other antibiotics on isolates from wound infections. Scientific Research and Essay. 2007;2(8):338-341.
 Barrett S. Colloidal silver: Risk without benefit. Quackwatch. 2019. Retrieved from https://www.quackwatch.org/01QuackeryRelatedTopics/PhonyAds/silverad.html.
 Griffith RS, Walsh DE, Myrmel KH, et al. Success of L-lysine therapy in frequently recurrent herpes simplex infection. Treatment and prophylaxis. Dermatologica. 1987;175(4):183-90.
 Pedrazini MC, Araujo VC, Montalli VAM. The effect of L-Lysine in recurrent herpes labialis: pilot study with a 8-year follow up. RGO – Revista Gaúcha de Odontologia. 2018;66(3).
 Karsch-Volk M, Barrett B, Kiefer D, et al. Echinacea for preventing and treating the common cold. Cochrane Database of Systematic Reviews. 2014.
 Gorusupudi A, Nelson K, Bernstein PS. The age-related eye disease 2 study: Micronutrients in the treatment of macular degeneration. 2017;8(1):40-53.
 Nair R, Maseeh A. Vitamin D: The “sunshine” vitamin. Journal of Pharmacology & Pharmacotherapeutics. 2012;3(2):118-126.