Small white particles on the eyes are caused by a variety of factors, common causes may include keratitis, conjunctival stones, blockage of the opening of the lid glands, granuloma and so on. 1. Keratitis: Usually the white particles are located in the black eye of the eye, and the patients will show symptoms such as eye congestion, redness, tingling, foreign body sensation, fear of light, and tearing, and so on, which will lead to small white particles on the eyes. 2. Conjunctival stones: occurring in the eyelid conjunctiva tissue on the inner surface of the eyelid, is due to the accumulation of cellular metabolites and fat and other white particles. They are usually accompanied by irritation such as a foreign body sensation in the eye. 3. Blepharoplasty: small white particles are usually located at the eyelid margins and the roots of the eyelashes. 4. Granuloma: most commonly found on the skin surface of the upper and lower eyelids, appearing in small nodules protruding from the surface of the skin, mostly in clusters, with no redness, swelling or tenderness on the surface of the skin. Its causes are mostly related to viral infections, which often invade the skin and ganglia, and when the body’s resistance decreases, localized subcutaneous nodules will appear, leading to the appearance of granuloma. The condition of small white granules on the eyes can not be treated by oneself, it is recommended to go to a regular hospital as soon as possible, under the guidance of the doctor to take corresponding methods of treatment.