Lenses for glasses
The secret to great looking and comfortable glasses is so simple...
Have the right lens in front of your eyes - ask us show you the difference!
Single Vision Lenses
The simplest form of spectacle or contact lens is the single-vision lens, made to a single prescription to correct a particular eyesight problem. Concave lenses are used to correct short sight and convex lenses to correct long sight. Concave lenses are generally thinner in the centre than they are at the edge and convex lenses are usually thinner at the edge than at the centre. The curvature of the lens, its thickness and weight will depend on the amount of long or short sight it is designed to correct. The lens material will also influence the thickness and weight of your lenses, as will the size and shape of the spectacle frame you choose. Traditionally, spectacle lenses were made of glass but most lenses are now lightweight plastic and there is a wide range of materials available to suit your prescription and lifestyle.
Bifocal lenses contain two optical powers with a distinct dividing line between the two parts. The most common use of bifocals is for people who have become older and need a different prescription for close work. The upper part of the lens corrects distance vision and the lower half is for near vision. Trifocals are also available that have three sections and incorporate a correction for intermediate vision. Bifocals and trifocals come in a range of designs but nowadays varifocal or progressive lenses are much more likely to be prescribed.
Varifocal lenses, also known as progressive lenses, are used for correcting problems with near vision that occur with age but unlike bifocal lenses have no visible dividing lines between the different corrections. Instead they have a graduated section in which the power of the lens progresses smoothly from one prescription to the other, allowing you to see clearly at all distances. These lenses also have the benefit of looking better - they don't draw attention to the ageing process. A range of designs is available depending on your lifestyle and occupation. Modern lens technology means that there are many different materials and brands to choose from. We will advise you personally on the best lenses to suit your eyes and your individual requirements.
Thinner Lighter Lenses
If you a high powered glasses or heavy lenses you can now improve the weight or appearance of your glasses with special lens materials and designs. A combination of materials and technology mean that lenses can now be made thinner, lighter and better looking than traditional lens types. These materials make lenses for short sight much thinner, while aspheric designs make lenses for long sight both thinner and lighter.
Whatever your prescription, it is important to protect the eyes against excessive ultraviolet (UV) radiation. Protection is needed to avoid reflected light from sand and snow or if you spend long periods out of doors, particularly in the summer. Prescription sunglasses can be made with single-vision, bifocal or varifocal designs to offer the same standard of protection as non-prescription sunglasses.
Special lenses and frames incorporating eye protection are available for a variety of safety and recreational uses.
Reflection Free Lenses
Spectacle lenses can be provided with anti-reflection coatings which virtually eliminate distracting reflections off the lens surfaces. Reducing reflected light is particularly helpful for computer users and for night driving. Anti-reflection coatings also improve the cosmetic appearance of your glasses and can make thick lenses look thinner.
Scratch Resistant Lenses
Plastic lenses are lighter than traditional glass lenses but they scratch more easily. Scratched lenses can be irritating for the wearer and look unsightly. Scratch-resistant coatings are available to protect your lenses against damage and prolong lens life.
Multi-coated lenses incorporate a combination of coatings - anti-reflection, scratch-resistant, water repellent and UV - they can also be made thinner lighter and flatter to combine to improve the properties of your spectacles. UV protective lenses are very important for your eyes - they reduce age related changes by locking UVA, UVB and blue light - this helps protect you eyes against conditions such as Age Related Macular Degeneration.
Call us at Quorn or Barrow to arrange a FREE demonstration of latest lens technology and how it can help you look great and see more clearly.