How to choose blue light glasses:a buyer's guide

There's a lot of noise around blue light glasses, and most of it is trying to sell you fear. This guide is the opposite: the handful of things that actually matter, so you can choose a pair with confidence and skip the rest.

Blue light glasses are simple in principle. A lens sits between your eyes and a light source, and it filters some of the light on the way through. What separates a good pair from a gimmick is which light it filters, how much, and whether that suits the hour you'll be wearing them. Get those three right and everything else is detail.

Start with the hour, not the frame

Most people shop for a frame first and a lens second. We'd flip that. The light you meet at 10am is not the light you meet at 10pm, so the honest question isn't "do these look good" but "when will I wear them." A lens tuned for a bright desk is the wrong lens for the last hour before bed, and vice versa.

At Helio® we build four lenses around the day: a White Grape lens for screens and true colour, a Lemon Yellow lens for everyday daytime, an Amber Honey all-rounder, and a Blood Orange lens for winding down. Pick the moment you struggle with most and let that choose the lens.

A good lens knows what to keep, not just what to cut.

The four things that actually matter

• UV protection. Every lens worth buying blocks 100% of UV, both UVA and UVB. Treat this as the baseline, not a headline feature - if a brand makes a fuss of it, ask what else they aren't telling you.
• Where the lens filters. A lens can cut the harsh, high-energy violet-blue while keeping the gentler daytime blue that helps set your body clock. That exact cut-off point is the whole craft.
• Colour and clarity. A heavier tint blocks more but shifts colour more; a lighter tint keeps colour true. Neither is "better" - they suit different moments, so decide how much shift you'll accept before you buy.
• Fit and comfort. The best lens is the one you'll actually wear, which means it has to sit right on your face and stay light across a full day.

What to be sceptical of

Be wary of numbers a brand can't stand behind. Claims about melatonin percentages, cellular repair or slowing ageing sound impressive, but the ones that hold up are modest and specific: how much of which wavelength a lens blocks, measured in a lab. If you can't trace a claim back to a spectral test, treat it as marketing.

Prescriptions, kids and everything in between

Two situations deserve a note before you buy. If you already wear prescription glasses, look for frames that take your prescription, so you're building a tint into lenses you'd wear anyway rather than stacking two pairs. Most Helio® frames are prescription-ready for exactly this reason, which keeps the fit slim and the view clean.

If you're shopping for children, flip the priorities. Fit and durability matter more than the theoretically perfect lens: a pair that survives the playground and actually stays on their face beats a flawless lens left in a school bag. Comfort is what keeps kids' glasses on - and glasses only do anything when they're worn.

The bottom line

Pick the moment you want help with, choose the lens that suits it, make sure it blocks 100% of UV, and check it fits. That's the whole decision. Anything a brand adds on top of that should make your choice clearer, not scarier.

Common questions

Do blue light glasses actually work? For the specific jobs they're designed for - easing eye comfort on long screen days, and holding back the daytime signal late at night - yes. They won't cure an eye condition or replace a good night's sleep, and any brand promising that is overselling.

Can I wear one pair all day? You can, but no single lens is ideal for every hour. A light, true-to-colour lens suits daytime screens; a deep, warm lens suits the last hour before bed. Matching the lens to the moment beats one compromise worn from dawn to dusk.

Will they change how colours look? It depends on the tint. Our lighter lenses keep colour close to true, which is why they're the pick for design and film. Warmer tints trade a gentle cast for more protection.

How do I judge a brand's claims? Ask for measured numbers - how much of which wavelength a lens blocks, from spectral lab testing. Vague promises about melatonin percentages or slowing ageing, with no data behind them, are marketing rather than science.

Do I still need these if I own sunglasses? They do a different job. Sunglasses cut overall brightness for strong sun; blue light lenses filter a specific band without darkening the room, so you can wear them at a desk. Here's the full comparison.