UV doesn't take winter off. It passes through cloud, bounces off snow and gets stronger with altitude. A five-year-old's eyes don't know it's October.
Protecting a child's eyes isn't just a summer habit. It's a year-round routine, and most parents start it later than they should.
Why kids' eyes are more vulnerable
A young child's lens is very clear. Where an adult eye filters part of the UV before it reaches the retina, a child's eye lets more through. The eye's natural filtering builds up over the years.
UV damage is also cumulative. Every hour of unprotected play adds to the hours before, and the World Health Organization links lifetime UV exposure to cataracts and other eye conditions. Protection is about lowering that lifetime dose, not just reacting to bright days.
Four situations parents underestimate
1. Overcast days
Much of the sun's UV passes through light or thin cloud. A grey afternoon at the park isn't a UV-free afternoon.
2. Snow and altitude
Fresh snow can reflect as much as 80% of UV, and UV levels rise by about 10–12% for every 1,000 metres of altitude, according to the WHO. Ski weeks, sledding and snowy mornings all call for sunglasses.
3. Water and beach
Sand and sea foam reflect extra UV on top of what comes from the sky. A toddler by the shore gets UV from above and around at once, which is why a hat plus sunglasses is the standard summer kit.
4. Spring sun
In March and April, UV levels rise faster than the temperature. Many parents reach for sunglasses in June, two months late. Low autumn sun also shines straight into the eyes.
What good UV protection looks like
- 100% UV protection. The label should say UV400 or 100% UVA/UVB. In the US, UV performance is covered by the voluntary ANSI Z80.3 standard, and lenses must pass the FDA impact test. Every OLIVIO&CO pair blocks 100% of UV.
- The right tint. A medium-dark everyday tint suits most bright conditions. See our guide to lens categories.
- A frame that stays put. Sunglasses that slide or pinch come off within minutes. Comfort is what makes protection consistent.
Beware cheap dark lenses with no UV label. A dark lens without UV filtering makes the pupils widen while still letting UV through, which is worse than wearing none.
Season-by-season checklist
| Season | Typical risk | Sunglasses? |
|---|---|---|
| Spring | UV rises faster than temperature | Yes, for daily outdoor time |
| Summer | Peak UV plus water and sand reflection | Yes, always |
| Autumn | Low sun shining directly into the eyes | Yes, especially mornings |
| Winter | Snow and altitude reflection | Yes, in snow and on bright days |
Building the habit early
- Keep one pair at home and one in the bag.
- Wear yours at the same time. Imitation does most of the work.
- Let your child choose the colour.
- Replace pairs that no longer fit. Faces grow; frames don't.
Frequently asked questions
Do children really need sunglasses in winter?
Yes, especially in snow and at altitude, and on bright days when the sun is low.
What does 100% UV mean?
The lens blocks all UVA and UVB up to 400 nanometres, often written UV400.
Is a dark lens enough?
No. Tint and UV protection are separate. Always check for UV400.
Where to start
Our ranges are sized by age: Toddler & Baby (0–3), Kids XS (3–5), Kids S (3–7) and Youth M (7–12). All polarized, all 100% UV.
Choosing a first pair? Read why kids should wear sunglasses and our kids' size guide.
