The simplest form of spectacle or contact lens is the single-vision lens. A single prescription to correct a particular eyesight problem. These lenses are also available bespoke, offering the latest technology to give the best possible vision.
Bifocal lenses contain two optical corrections with a distinct dividing line between the two parts. 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.
Varifocal or progressive lenses
Varifocal lenses, also known as progressive lenses, are used for correcting presbyopia 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 the wearer to see clearly at all distances. A range of varifocal designs is available depending on your lifestyle and occupation. Modern lens technology means that there are many different designs and materials to choose from, including bespoke lenses which take your lifestyle and frame choice into consideration upon designing and creating your lenses.
These are very similar to the varifocal (progressive) lenses above, however these lenses offer wider intermediate (VDU) and near (documents) zones. These are ideal lenses for those who work in an office type environment and need the design of the lenses focused around these 2 zones. These are available in a range of different designs based around your visual needs. These lenses are NOT SUITABLE FOR DRIVING.
If you need high-powered lenses you can improve the weight or appearance of your glasses with special lens materials and designs. High-index materials and aspheric designs mean that the majority of lenses can now be made thinner, lighter and better looking than traditional lens types.