How much blue light do these glasses block?

About 40%, according to the maker. That is a mild filter, enough to soften screen glare without the strong amber tint of full blue-blocking glasses.

Will colors look different through the lenses?

The maker says there is almost no color distortion. Most buyers report screens and print look close to normal, unlike heavier blue-light lenses that shift toward yellow.

What are the frame measurements?

The frame is about 136mm wide, lenses about 52mm wide and 42mm tall, the bridge about 13mm, and the temples about 135mm. Check these against a pair you already own for fit.

Do the glasses have spring hinges?

Yes. The plastic frame uses spring hinges, which flex outward and can make the fit more forgiving than fixed hinges.

Are the lenses glass or plastic?

They are acrylic, a lightweight plastic. Acrylic is lighter than glass but scratches more easily, so store them in a case.

Are these good for computer work?

They are reading glasses with a mild blue-light filter, so they suit screen reading at close range. They are not a substitute for prescription lenses if you need vision correction.