A) If an unprotected human eye was directly exposed to a nuclear flash e.g. 1 Megaton bomb range 4 miles, what would be the time at which permanent damage to the eye occurs?

b) Would a lens filter with a switching response of 20nS provide any useful protection?

1 megaton bomb/range 4 miles...During the bikini atoll nuclear bomb tests,on certain live animals that were placed in and around the proximity of the surrounding bomb blast areas,on the research animals that were retreived,it was found that, the damage would be at the very instant the Human eye was exposed to the nuclear flash, wether directly or in-directly exposed to the flash,anything exposed to the nuclear flash inside the TWELVE mile range would be burned seriously,before the concussion,or shockwave effects were immediately felt, and several seconds after the nuclear flash when the Gamma radiation was at its peak performance,is the worst possible time for the Human eye to be exposed these bomb blast effects.....A lens filter with a switching response of 20nS might offer some protection,but the best way to keep from getting serious eye damage or burns is to look away from the blast.

1 megaton bomb/range 4 miles...During the bikini atoll nuclear bomb tests,on certain live animals that were placed in and around the proximity of the surrounding bomb blast areas,on the research animals that were retreived,it was found that, the damage would be at the very instant the Human eye was exposed to the nuclear flash, wether directly or in-directly exposed to the flash,anything exposed to the nuclear flash inside the TWELVE mile range would be burned seriously,before the concussion,or shockwave effects were immediately felt, and several seconds after the nuclear flash when the Gamma radiation was at its peak performance,is the worst possible time for the Human eye to be exposed these bomb blast effects.....A lens filter with a switching response of 20nS might offer some protection,but the best way to keep from getting serious eye damage or burns is to look away from the blast.