Sunglasses

Our sunglasses collections can be viewed and purchased by clicking on the images below.

UV rating

All of our sunglasses have UV400 rating, except those listed in the fashion collection. What does this mean? Sunglasses without UV400 rating will not protect your child's eyes from UV damage. Our fashion glasses should be used as toys or in situations where UV is not present, such as night-time. 

Tinted glasses cause the eye to dilate, and if UV protection is not available, this means more UV enters the eye than if sunglasses were not worn! To receive best protection from UV radiation, sports style sunglasses or wide frames should be used which can prevent UV from entering from the temporal side, as well as front on. 

UV400 rating means both UVA and UVB radiation (the only two UV forms present at the earth's surface) are prevented from passing through the sunglasses. The A and B distinguish between 320-400 nanometer (nm) and 280-230 nm wavelengths respectively. These wavelengths are shorter than visible light and have more energy which increases potential damage caused by UV. Both UVA and UVB are absorbed by UV400 rated sunglasses, whereas visible light is reflected to various degrees by any sunglasses.

UV Damage

While most of us know that UV causes sunburn, it can also cause eye damage. UVB is absorbed by the surface layers of the eye, the cornea and conjunctiva, while UVA is absorbed by the lens. UV irradiation  converts the UV absorption molecules in the eye to free radicals, which in turn cause oxidative damage to the cornea and lens.

So what does that mean for eye health? UV irradiation can contribute to melanoma, cataracts, macular degeneration, photokeratitis (ie: welder's flash or snow blindness), keratopathy drop (an elastotic degeneration of corneal collagen), and pterygium (a fleshy overgrowth of conjunctiva).

 

In a majority of cases, the damage is caused over a period of time, particularly in childhood, with consequences not realised until adulthood. While UV damage to skin is most prevalent between 10 am and 2 pm, the highest damage to eyes is caused between 8-10 am and 2-4 pm, with variances due to latitude and season. While the sun is directly overhead, UV waves cannot reach the eyes, due to protection from eyebrows and eyelashes, unless reflected off other surfaces. UV is increased by reflective surfaces, such as water.

UV Eye Protection

Eyes are best protected by large, close fitting lenses which wrap around the temple area. Glasses should not be touching eyelashes. The lenses should have a UV400 rating, or equivalent rating according to the standard used, to ensure both UVA and UVB wavelengths are prevented from reaching the eye. 

Sun Glare

There are three forms of sun glare, and this is what majority of us wear sunglasses for. Disability glare is light in the eye which does not form part of the retinal image, ie: glare formed from light shining through smeared bugs on the windscreen. When this is due to fluorescence, UVA absorbing glasses can reduce disability glare, but otherwise it cannot be controlled. Reflected glare comes from water, shiny surfaces, etc and is best absorbed by angled polarised lenses. Majority of glare comes from horizontal surfaces (ie: water) and thus polarised sunglasses are suitably orientated to neutralise horizontal reflected glare. Discomfort glare is caused by light sources or other bright objects and can be reduced by sunglasses.

 

Blue Light

While there is blue light in sunlight, most experts agree the levels are not high enough to cause damage. However if your children spend time in front of screens emitting blue light, you should consider protective glasses which can block this wave length.

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ABN: 48 023 365 089