In some Vietnamese optical shops there are pre-focused, non-prescription eyeglasses. They are economically priced (cheap).
These are intended for older folks for reading. They simply try on different pairs until they can read clearly.
If anyone knows where they are sold, I would appreciate the store name and address.
These will be used for a destructive application (i.e. after they have been used they will be of no use).
Thanks, in anticipation.
P.S. Expensive stores don't carry them, they want the prescription cutting business.