WASHINGTON (AP) — Hillary Rodham Clinton's thick-framed glasses aren't just a style statement.

Spokesman Philippe Reines says the secretary of state will be wearing the glasses instead of contacts for a period of time because of lingering issues stemming from a concussion she suffered in December.

The dark glasses with rectangular lenses have been conspicuously present since Clinton returned to work this month.

Reines gave no details on what types of lenses she is using

But he insisted Friday that with them on, Clinton sees "just fine."

He said Clinton has enjoyed reading humorous articles interpreting what each adjustment of her glasses means.