“Industrial-quality eye protective devices”, as used in N.C. Gen. Stat. § 115C-166, means devices meeting the standards of the U.S.A. Standard Practice for Occupational and Educational Eye and Face Protection, Z 87.1-1968 approved by the U.S.A. Standards Institute, Inc. (1969, c. 1050, s. 3; 1981, c. 423, s. 1.)