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How Lasers Damage the Eyes. Be it an accident or on purpose, staring into a laser pointer can cause some serious damage to your eye. The kind of damage caused (permanent or temporary) is determined on a case by case basis. Damage also depends on how strong the laser is.
Damage to the blood vessels in your eyes (called diabetic retinopathy) can cause vision loss. When retinopathy is found early, laser treatment can help keep you from losing your vision. If it's not treated, retinopathy can cause blindness. Diabetic retinopathy affects your retina.