The Great British summer has arrived, and with it the glorious promise of family holidays, long walks through the countryside and – fingers crossed – many many sunshine-filled days.
Here at Infocus Opticians we look forward to the summer season as a time to spend outdoors with our families, but as optometrists we’re also wary of the potential damage the glaring sun can inflict upon your eyes. Which is why we recommend polarised lenses for sunglasses.
Unlike normal sunglasses, polarised lenses UK block 100% of harmful UVA and UVB rays and effectively shield your vision from dazzling (and potentially dangerous) glare. The unique anti-reflection qualities of polarised lenses have made them popular with fisherman and boaters for years, reducing glare from the surrounding ocean, but the filter has since become widespread in high quality sunglasses around the globe.
Indeed, outdoor enthusiasts such as cyclists, golfers, hikers and skiers all stand to benefit hugely from the unique qualities of polarised glass, which improves safety, enhances the outdoor experience and optimises performance. In addition, the filter is useful for drivers, as it blocks blinding glare from the road’s surface.
So how do polarised lenses for sunglasses work?
When light bounces off an object, its waves scatter in all directions, but when light hits a reflective surface – such as water, snow, roads or windows – it becomes ‘polarised’. This means the light goes from being scattered in all directions to travelling in a more uniform direction – generating glare. Glare from the sun distorts your vision, warps your depth perception, reduces colour contrast and can even cause temporary blindness.
Polarised glass works by blocking 50% of rays passing through the lens, dramatically reducing the impact of this intense reflected light. Each lens is coated with thousands of rows of tiny iodine crystals or dichroic dyes that block out horizontal polarised light waves and allow only vertically angled light to pass through. This process eliminates glare and results in improved comfort, better colour contrast and enhanced visual acuity. And as an added bonus, your shades could protect you from smart-phone addiction, as polarised lenses UK can reduce visibility of images displayed on LCD or LED screens!
In appearance polarised sunglasses are often indecipherable from normal shades, but when you’re thinking about polarised sunglasses vs normal sunglasses, it’s important to note some key differences
• Normal tinted sunglasses reduce brightness, but don’t be fooled by the darkness of the lens – this doesn’t accurately indicate their ability to neutralise harmful UV rays. Only polarised lenses UK can block out dangerous, blinding glare.
• By neutralising glare, polarised lenses for sunglasses stop you squinting when enjoying your outdoor pursuits, reducing eyestrain and enabling you to see more clearly.
• Fishermen often use polarised glasses to take the glare off the water’s surface so they can identify fish beneath the surface. Likewise, skiers use polarised lenses to identify hidden bumps in the snow.
Perfect for a family outing to the beach, driving on a sunny day, or cruising on a boat, polarised lenses for sunglasses optimise your visual experience in the great outdoors. And when you pit polarised sunglasses vs normal sunglasses there’s no contest when it comes to protecting your eyes against harmful UV rays.
At Infocus Opticians we like to keep your vision, well, in focus, which is why we recommend that you opt for polarised lenses UK. If you’re interested in getting polarised lenses fitted in your next pair of shades, simply pop into the practice and our team of dispensing opticians will be more than happy to help.