Sunglasses are more than a fashion accessory. They help protect the eyes from ultraviolet rays, reduce glare and improve visual comfort. However, your needs may be very different when cycling, driving long distances or travelling in a sunny destination.
Here are the main factors to consider when choosing sunglasses that suit your lifestyle.
UV protection: the essential criterion
Regardless of the activity, the first thing to look for is protection against UVA and UVB rays. The colour or darkness of the lenses does not indicate their level of protection. A very dark lens is not necessarily more effective at blocking UV rays.
Choose sunglasses that offer complete UVA and UVB protection, often identified by a UV400 label. According to Health Canada, UV protection cannot be determined by the price, colour or darkness of the lenses alone.
The frame also plays a role. A sufficiently large or slightly wraparound design can help limit the amount of sunlight reaching the eyes from the sides.
For sports: stability, durability and contrast
When running, cycling, hiking or playing an outdoor sport, sunglasses need to stay securely in place. A lightweight, wraparound frame with non-slip temples or nose pads generally provides a more stable fit during movement.
Lens durability is also important. Lightweight, impact-resistant materials are particularly helpful during activities where debris, branches, insects or small objects could come into contact with the face.
Lens colour can be selected according to the environment:
- grey lenses reduce brightness while maintaining natural colour perception;
- brown or copper lenses enhance contrast and work well for cycling, hiking and many outdoor sports;
- yellow or orange lenses may enhance contrast in low-light or overcast conditions, but are not always suitable for bright sunlight;
- mirrored lenses may provide additional comfort in very bright conditions.
Polarized lenses are especially useful for water sports, skiing and activities around snow. They reduce glare reflected from horizontal surfaces such as water, snow and pavement.
For driving: reduce glare without making everything too dark
When driving, sunglasses should allow you to see the road, traffic signs, signals and obstacles clearly. Grey, brown and green lenses are often good choices because they reduce brightness while maintaining relatively natural colour perception.
Polarized lenses can improve comfort by reducing glare from pavement, vehicle hoods and wet surfaces. However, they may change the appearance of certain digital displays. It is a good idea to check their compatibility with your dashboard and vehicle screens before making a final choice.
Very dark lenses designed for extremely bright conditions are not recommended for driving. Sunglasses should also never be worn for nighttime driving.
Photochromic lenses can be convenient for everyday use, but some models do not darken as much inside a vehicle because the windshield blocks some of the UV rays needed to activate them. Sunglasses designed specifically for driving may provide greater comfort.
For travel: versatility and lasting protection
Light conditions can change quickly while travelling—from sightseeing in the city and relaxing at the beach to hiking in the mountains or taking a road trip. A versatile and comfortable pair that can be worn for several hours is essential.
Polarized lenses are practical for destinations near water and other highly reflective environments. A well-covering frame can also help protect the eyes from sunlight, wind, sand and dust.
Proper sun protection is especially important when travelling at high altitudes or in snowy regions. UV intensity increases with altitude, while snow can reflect a significant amount of light toward the eyes.
Remember to bring a hard case, a cleaning cloth and, if possible, a backup pair. People who require vision correction can also choose prescription sunglasses to enjoy clear vision without compromising protection.
Choosing the right lens colour
Lens colour primarily affects visual comfort and contrast perception. By itself, it does not determine the level of UV protection.
- Grey: versatile and maintains natural colour perception.
- Brown or copper: enhances contrast and depth perception.
- Green: provides a good balance between contrast and colour accuracy.
- Yellow or orange: useful in low-light conditions but less suitable for intense sunlight.
- Mirrored: helpful in very bright environments.
The best choice depends on your sensitivity to light, your activities and your visual preferences.
Sunglasses tailored to your vision
Sunglasses can be made with your prescription, including progressive lenses. Other options may be added, such as polarization, an anti-reflective coating on the back surface of the lenses or a scratch-resistant treatment.
Before making your choice, think about where and how you will use your sunglasses most often. Someone who spends a great deal of time driving will not have exactly the same needs as a cyclist, water sports enthusiast or frequent traveller.
Your IRIS eye care professional can help you find the right combination of frame, tint, protection and vision correction. This ensures that your sunglasses are truly suited to your activities while protecting your eyes in style.
