Sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or dazzling the eyes.

Most people find direct sunlight too bright for comfort during outdoor activities and would benefit from sunglasses. Healthcare professionals recommend eye protection whenever the sun comes out to protect the eyes from ultraviolet radiation (UV) and blue light, which can cause several serious eye problems such as cataracts, pterygium and macular degeneration.

Sunglasses can be purely sun protection or they can also function as your visual aid, so being made to your exact prescription. If you need prescription spectacles for outdoors and don’t choose photochromic lenses for everyday use, then we recommend a separate prescription sunglass pair featuring lenses that are coloured, darkened and/or polarised.

The European solar protection category standards have been designed to ensure wearers can rely on the safety and visual performance quality provided by sun lenses. All sunglass lenses we sell are categorised and CE marked in one of the following categories:

Category Visible Light Transmission Level Further Info


80–100% Clear or very light tinted. Used for safety glasses or spectacles where you need to see clearly.


46–79% For casual use, e.g. in fashion eyewear.


18–45% Most common category used in sunglasses. Good protection from visible light and UV rays.


8–17% Extra protection from visible light. Good for sports such as skiing.


3–8% Highest protection from UV and visible light. These lenses are too dark for driving, and are suited to specific situations like mountaineering.

At Norman Prince Opticians, we stock and supply a wide range of sunglasses.

At each of our locations we stock different ranges, to suit the practice‘s clientele. This means that, across the group of practices, we can supply from a huge variety of manufacturers and designers.

Please see the individual locations’ pages for their ranges: