Sun glasses are protective eye wear which is used to protect eyes from harmful radiations of sun. Eyes are important part of our body as it helps you to see entire world, without eyes the entire world seems dark and life seems to be meaningless. Therefore it is a need to protect our eyes. In very bright conditions, the pupil controls the amount of light reaching the retina, which is very delicate and light sensitive part of eye. 
But when conditions are adverse pupil cannot contract to desired level and more harmful rays reaches the retina there by damaging it. In such conditions using sun glasses is a must. Sun glasses reduce the amount of light reaching the eyes to a more comfortable level and therefore reduce the stress of contraction of pupil. Sunglasses also help to enhance the vision. All sunglasses are tinted to cut down brightness. Therefore you can choose correct color tint based on the requirements, such as for your sport or activity.
But when conditions are adverse pupil cannot contract to desired level and more harmful rays reaches the retina there by damaging it. In such conditions using sun glasses is a must. Sun glasses reduce the amount of light reaching the eyes to a more comfortable level and therefore reduce the stress of contraction of pupil. Sunglasses also help to enhance the vision. All sunglasses are tinted to cut down brightness. Therefore you can choose correct color tint based on the requirements, such as for your sport or activity.Prime Optics is the best known store in UK which supplies wide range of men’s sun glasses with Awarded #1 designer sunglasses . They have standard quality and branded products and hence are trusted by many people. They also sell designer sun glasses of different colors, designs and patterns. They have their official website through which you can buy the sun glasses or you can visit their stores and buy them personally.