You searched for Resources within the "Medicare" category.
Centers for Medicare and Medicaid Services (CMS)
(Formerly the Health Care Financing Administration) Statistics for health care expenditures and projections that include vision care products, medicare enrollment and utilization, practice expense data files and much more.
Medicare Chart Book 2005
"This updated resource features more than 80 charts and tables with detailed information about the Medicare program and the 42 million seniors and younger people with disabilities who rely on the program for health insurance coverage."
The official US Government site for information about the Medicare program as to basics, coverages, supplemental plans, and publications.