I have 2 pairs of glasses. Work/Computer glasses that have the prescription optimized for 18" (my preferred distance to the monitor). General lenses (bi-focals)

I have 2 pairs of glasses. Work/Computer glasses that have the prescription optimized for 18" (my preferred distance to the monitor). General lenses (bi-focals) for reading and driving/TV. I'll ALWAYS have my dedicated computer glasses, the difference is incredible.