Many people who have relied on a vision plan as part of their employee benefits package during their working adult life are surprised when they turn 65 and convert to Medicare.

The reason: Medicare benefits do not include coverage for eyeglasses or contact lenses.

A new study by University of Michigan Kellogg Eye Center researchers shows an overwhelming 92% of older adults enrolled in Medicare use eyeglasses.

It’s a figure that may fuel further debate about expanding the scope of services for those enrolled in the insurance program.