You may have expected that acid would be at the top of the list and you would not be too far wrong as acids can cause a serious burn. Caustic substances however, are even more dangerous as they tend to stick to the eye tissue and are difficult to dilute quickly and flush from the eye.
EYE CONTACT: Instillation into the eye may result in transient superficial effects similar to those produced by mild toilet soaps and detergents.
EYE CONTACT: May cause stinoging Rinse with plenty of water.
EYE CONTACT: Eye Hazards - Irritant to the eyes. Rinse with water
EYE CONTACT: Corrosive to the eyes. May cause severe irritation or damage to eyes
EYE CONTACT: Mild to severe irritant. May cause burns if not flushed with water.
EYE CONTACT: CAUTION. The mixture may cause severe irritation and possible permanent eye injury.
EYE CONTACT: Immediate pain, severe burns and corneal damage which may result in blindness.
EYE CONTACT: Caustic soda is destructive to eye tissues on contact. Will cause severe burns that result in damage to the eyes and even blindness