Eyeglasses sold or prescribed in this state as impact-resistant eyeglasses shall meet the following minimum standards:
(1) If the lenses of the eyeglasses are made of glass, the lenses shall be capable of withstanding the impact of a five-eighths inch (5/8") steel ball dropped from a height of fifty inches (50"); and
(2) When plastic materials are used in the construction of ophthalmic lenses or frames, the material shall be slow burning.
(3) Cellulose nitrate or materials having flammability characteristics approximating those of cellulose nitrate shall not be used.
(4) Flammability of the materials shall be no greater than that exhibited by cellulose acetate or acetate butyrate.