EN 
PT Find out how to protect your eyes from UV radiation in summer and why you should choose sunglasses with guaranteed protection. Practical and effective tips!
In summer, it's natural to think about protecting your skin from the sun's rays. But what about the eyes? Eye protection in summer is essential to prevent more serious silent eye diseases such as cataracts and retinal degeneration. In this article, we explain why you should wear glasses with UV protectionand how to choose the right model for you and your family.
1. Why is it important to protect your eyes in summer?
Ultraviolet (UV) radiation is present even on cloudy days. Direct and prolonged exposure to UVA and UVB rays can cause:
- Photokeratitis (painful inflammation of the cornea, like a "sunburn")
- Early cataracts
- AMD (Age-Related Macular Degeneration)
- Ageing of the lens and retina
What's more, unprotected exposure accelerates the natural wear and tear on vision throughout life.
2. Technical explanation: what is a UV filter and how does it work?
There are two main types of UV radiation that are harmful to the eyes:
- UVA (affects the retina and contributes to eye ageing)
- UVB (affects the cornea and lens, causes more immediate damage) - What does "UV400" mean?
Glasses with a UV400 filter block 100% of UVA and UVB radiation down to 400 nanometres - the level of protection recommended by the WHO and the Portuguese Ophthalmological Society.
Not all sunglasses protect your eyes. Some cheap models darken vision, but don't block UV rays, which dilates the pupil and increases exposure to sun damage.
3. Common myths about eye protection in summer
"If it's cloudy, I don't need sunglasses."
Wrong. Up to 90% of UV radiation passes through clouds.
Always wear glasses with a UV filter, even when the sky is overcast.
"I only wear sunglasses on the beach or by the pool."
Dangerous. A solar radiation reflects off tarmac, sand, water and windowsThis affects vision even in urban environments.
"Any dark glasses protect your eyes."
False. Only glasses with certified UV protection (UV400) guarantee real protection. Darkening the lens is not synonymous with protection.
4. Studies and data: the real impact of UV radiation on the eyes
- According to the World Health Organisation, 20% of the world's cataract cases are attributed to prolonged exposure to UV rays.
- A Portuguese Ophthalmological Society recommends wearing glasses every day with UV protection, even outside of summer.
- Studies show that reflection of UV radiation on surfaces such as water, sand and snow can increase exposure up to 85%.
What's more:
- Children receive 3 times more sun exposure accumulated in the eyes up to the age of 18 than adults.
- Intense exposure in the first 20 years of life increases the risk of chronic eye diseases in the future.
5. Where can I find sunglasses with guaranteed protection?
No Centro Óptico Ibérico you'll find a selection of sunglasses with UV400 protection, available for the whole family:
- Recognised brands: Ray-Ban, Vogue, Gucci, Tom Ford
- Options with or without a degree
- Frames adapted to children's faces
- Personalised in-store advice
View online shop or visit one of our physical shops in Vila Verde, Barcelos, Valença, Melgaço or Monção.
6. Book your free optometry appointment
Protecting your eyes goes beyond the right glasses. We recommend:
-
- Visual acuity assessment
- Checking the need for prescription sunglasses
- Personalised optometry consultation
Visual health should be a priority, especially in the months of increased sun exposure. Wearing glasses with certified UV protection is a simple gesture that can prevent future problems. Bet on your vision and that of your family with the confidence of Centro Óptico Ibérico - professionals dedicated to your eye health since 1991.
Book an appointment is simple and free - at any of the Centro Óptico Ibérico shops.
