“…Exposure may also damage peripheral nerves and cause changes to the kidney and blood. Numerous studies have shown that styrene exposures were linked to central and peripheral neurologic, 2,3,4 optic, 5,6 and irritant 7 effects when occupational exposures to styrene emissions were greater than 50 parts per million (ppm). There is also evidence concerning the influence of occupational styrene exposure on sensory nerve conduction indicating that 1) 5-10% reductions can occur after exposure at 100 ppm or more, 2) reduced peripheral nerve conduction velocity and sensory amplitude can occur after styrene exposure at 50 to 100 ppm, 3) slowed reaction time appears to begin after exposures as low as 50 ppm and 4) statistically significant reductions in color discrimination (dyschromatopsia) may occur.…”