There are four types of hypersensitivity reaction, classified according to the way in which the ALLERGEN or ANTIGEN activates the reaction. The classic allergic reaction is the type I hypersensitivity reaction, with exposure to an external substance (the allergen) initiating the IMMUNE RESPONSE.
Flickering lights in vision, Headache and Sudden flash of lights. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms flickering lights in vision, headache and sudden flash of lights including Migraine headache (adult), Tension headache, and Ocular migraine.
Retinal detachment is painless. Symptoms of retinal detachment include blurred vision, bright flashes of light in the peripheral vision, or partial blindness. You may also experience a sudden increase in floaters, which appear as debris, cobweb-like lights, or specks of light in your field of vision.ymptoms of retinal detachment include blurred vision, bright flashes of light in the peripheral vision, or partial blindness. You may also experience a sudden increase in floaters, which appear as debris, cobweb-like lights, or specks of light in your field of vision.