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
The buyer’s guide: how to spend the least on the unproven part
If you have decided to buy anyway, this is how to do it without overpaying: lens type, fit, prescriptions, returns, and the claims worth ignoring.
Buying · 8 min read
Prescription or not? The question that actually matters
An uncorrected prescription causes the symptoms people blame on blue light. Working out which situation you are in is the highest-value thing 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.