Contact lens, gas permeable, bifocal, one lens. Assign HCPCS code(s)

__________________________ are present in commercial insecticides and although rare, toxic exposures may prove to be fatal

a. Narcotics b. Tricyclic antidepressants c. Organophosphates d. Carbemazepines

What is used to attach the archwire to the brackets?

a. Ligature wire b. Plastic rings c. O-rings d. All of the above