1. Her wandering eye may be wandering again and they didn’t want that known.
2. She may have had to use the Fresnel stick on lens thing again and they didn’t want people to know.
http://www.rooteyedictionary.com/fresnel-stick-on-prism/
She was wearing “those” glasses on her plane the last couple of days (see nightime photo of her & Huma through the plane’s windows).
The young woman is holding Hillary’s arm like she’s holding up Grandma. Can you imagine an aid walking Hilly in to her meeting with President Putin.