AR COAT DECREASES POLYCARBONATE STRENGTH

This is so strange. Here's the conclusion from this recent study:

"applying a MAR coating further reduces the penetration resistance. Therefore, the use of 2-mm center thickness and anti-reflective coated polycarbonate lenses should be discouraged for industrial eye protectors where sharp missile hazards are possible."

Optometry & Vision Science. 82(11):964-969, November 2005.