Category

Buying

If you have decided to buy, these cover the decisions that actually affect whether you are happy with the result.

Last reviewed August 2026. We update a page when the underlying evidence changes, not on a schedule.

Buying · 11 min read
How to choose blue light glasses
Four steps in the order that matters: name your reason, sort the prescription, ignore the filtering percentage, judge the frame. Plus the claims that should make you close the tab.
Buying · 8 min read
Prescription blue light glasses: when you need them
An uncorrected prescription causes the symptoms people blame on blue light. Working out which situation you are in is the highest-value decision on this site.
Buying · 8 min read
Fit before style: getting frame measurements right
The numbers printed inside the temple arm tell you more about whether a frame will suit you than any face-shape chart. Here is how to read them.