Vision benefits are worth looking at.
Schiff
L
L
D003362:Cost-Benefit Analysis; D006264:Health Benefit Plans, Employee / Q000706:statistics & numerical data*; D006801:Humans; D019458:Insurance Coverage; D008329:Managed Care Programs / Q000191:economics / Q000592:standards; D014481:United States; D014787:Vision Tests / Q000191:economics / Q000592:standards*