Sudden stabbing pain in the eyes like a needle for a while is usually caused by visual fatigue, conjunctivitis, keratitis and other reasons. 1. Visual fatigue: when the eyes are used for a long time and do not get any rest, visual fatigue can occur, such as soreness and dryness of the eyes, sudden stabbing pain and other uncomfortable symptoms, which can be relieved after the eyes get enough rest. 2. Conjunctivitis: Conjunctivitis generally refers to conjunctival inflammation caused by various internal and external factors, usually due to bacterial infection, viral infection and other causes, patients may experience symptoms such as stinging, burning, redness and swelling. 3. Keratitis: Keratitis generally refers to inflammation of the cornea caused by various undesirable factors, and patients may experience symptoms such as blurred vision, pain, tingling, and vision loss. If the sudden stinging pain in the eyes is recurrent and accompanied by other discomforts such as redness in the eyes, it is recommended that the patient should identify the cause of the disease under the guidance of the doctor and actively cooperate with the treatment.