My glasses are prescription, so when I ordered some new glasses I told the optometrist what I wanted. The way I would describe the glasses I wear are:
A pair of
blue solid mirrored coating prescription glasses. The lenses have no internal tint. Therefore it is possible to wear them indoors because they are not true sunglasses. Mirror coatings can be solid mirror or flash mirror.
Solid mirror coating lenses are completely nontransparent; whereas flash mirror coated lenses are partially transparent. In my case I specified
high-index lenses because I have an extreme case of nearsightedness. As a result glass lenses would otherwise have to be very thick to address this condition; whereas high-index plastic lenses are much thinner and lighter. The glasses are
polarized to prevent glare. Mirror finish lenses produce substantial reflective glare.
If you do not need prescription glasses, then these can be fairly inexpensive. Just search on Amazon for "blue mirrored sunglasses". Here is an example:
![Image](https://images-na.ssl-images-amazon.com/images/I/51ixNo-4NcL._AC_UX679_.jpg)
SOJOS Classic Aviator Mirrored Flat Lens Sunglasses Metal Frame with Spring Hinges SJ1030 for $14.94
.