Vision for the optically challenged is constantly fine tuned and adjusted to meet the needs of its constituents. Squinting is a sure sign that the expiration date has passed and the correction is minuscule, and the hazard that is inextricably linked to operating pass expired dates is a challenge to the authenticity of the one that printed the date. So what’s really in a date other than the threat of lenses submerged in chemical reactions that potentially eliminate correction thus causing blindness. So the moral is that we are all at times optically challenged whether it is the failure to make plain the vision, eventually causing distortion, or staying in the elements so long that we lose vision. And it is possible to be set in complete darkness and simultaneously see as if a lantern were permanently attached to ones feet. What is necessary is that someone point us in the right direction.