1) Must Generate random letters in a Snellen "Eye Chart" fashion.
2) Must be able to be calibrated
3) Must present a mirror image of letters to be reflected (projected) across a room.
4) Must be able to isolate on a letter as needed.
See [url removed, login to view] for example of Snellen Eye Chart
See [url removed, login to view] for example of similar software.
Large practice wants to develop own package for use in house.