Scratch resistant corrective smart device overlay

An overlay for use with a smart device having a touch screen, the overlay comprising:

• a protective layer configured to prevent damage to the touch screen, the protective layer having a protective layer height;
• a corrective layer configured to correct an image displayed by the touch screen, the corrective layer having a corrective layer prescription and a corrective layer height,
• wherein the corrective layer prescription is a function of at least a viewing distance and a user prescription,
• wherein the viewing distance is the distance between a user's eyes and the touch screen, and
• wherein the user prescription is the prescription of a user's visual aid apparatus;
• and
• an adhesive layer configured to attach the overlay to the touch screen, the adhesive layer having an adhesive layer height,
• wherein the adhesive layer is disposed above the touch screen, the corrective layer is disposed above the adhesive layer, and the protective layer is disposed above the corrective layer, and
• wherein the protective layer, the corrective layer, and the adhesive layer each have the same approximate surface area.