What if there is a thorn in the eye? Quickly go to an ophthalmologist (optometrist) who knows how to remove the eyesore.
Only surgical treatment can completely remove corneal leucoma: corneal transplantation or keratoprosthesis using a synthetic cornea analog (keratoprosthesis). 
Corneal transplantation, such as penetrating keratoplasty (PK) and lamellar keratoplasty (LK), is an excellent treatment for eyesore that want to regain their visual acuity. However, after corneal transplantation, many people experience graft rejection and chronic loss of endothelial cells. , 
Keratopigmentation (QFT) has been used for cosmetic purposes for centuries when visual reconstruction is ineffective. Galen (131-201 AD) used copper sulfate to stain the leucoma of the cornea , . Later, surgeons used Indian ink to shade the scars of patients with corneal leucoma. Cosmetic contact lenses are known to be the most commonly used method for improving aesthetics . However, people may be intolerant of wearing contact lenses, refusing a prosthesis for psychological reasons, or have chronic inflammation and infection .
But in the early stages of the formation of the diarrhea, drug therapy is used.
To improve the microcirculation in the eye and enhance fibrinolysis, medications containing methylethylpyridinol hydrochloride are used: Lacmox, Emoxipin, Emoxypharm. Method of application - instillation in the conjunctival sac (three times a day, one or two drops). The duration of treatment is determined by the doctor. Drops can cause temporary itching, burning and redness of the eyes.
Such drops for eyes from the cataract, such as Carnosine (Sevitin), Taurine (Tauphon), Hilo-kea (with sodium hyaluronate and dexpanthenol), Ayurvedic means Uzala (Ujal) can also be prescribed. Drops with glucocorticosteroids, in particular with dexamethasone (reduces neovascularization and lymphangiogenesis, improves the barrier function of the eye) , hyaluronidase are used. 
The antitubus drug Collalizin (in the form of a lyophilisate for preparing a solution) is used by electrophoresis and phonophoresis. Also, physiotherapy treatment is carried out using a different proteolytic enzyme - lidaza, corticosteroids (hydrocortisone) and potassium iodide solution.
It is recommended to take vitamins, first of all, ascorbic acid, (vitamin C accelerates the proliferation of corneal epithelial cells and the healing of epithelial defects) tocopherol acetate , , and thiamine. Read more - Vitamins and Vision
It should be borne in mind that treating an eye disease at home does not lead to its disappearance, and that dripping onion juice (mixed with honey or milk) into the eyes is useless and dangerous, since this “folk treatment” may cause additional irritation of the cornea and retina. Eyes.
There is no clinical evidence of efficacy and herbal treatment, in particular, washing and drowning eyes with decoctions of eyebright (Euphrasia officinalis), golden whiskers (Callisia fragrans) and blue cornflower (Centaurea cyanus). Although these medicinal plants, including onion juice, can be used as an adjuvant for inflammation of the conjunctiva of the eyes.