Target population [retired persons, readers, rural population, urban, middle, upper rich,]
Pension averages, average income,[1/10th of av. mo. Income as cost]
Very poor, single parents [mainly women] and church or religious members, free?
1 International price of eye wear
2 Distribution of eye wear
3 Cultural issues
4 Protocols
5. Patients affordability
6 access by patients
7 access to patients
8 maintenance and continuous supply