Spectacle lens technology has advanced a lot in recent years. Modern lens materials and manufacturing technology has resulted in lighter, thinner and more attractive lenses.
At Park & Brown we use Rodenstock and Shamir as our main suppliers of lenses. Using these “hi-tech” manufacturers we can use some of the thinnest and lightest lenses available. All our lenses are computer designed to give the thinnest lens from the range of lens that you choose. As with all our services we are happy to advise on the best lens to suit you prescription.
So whether you require single vision, varifocals, or bifocal lenses we can offer the best solution for your vision.
SINGLE VISION LENSES
There has never been a greater choice of lenses that help to reduce the weight of your spectacles and enhance the appearance. We recommend plastic lenses for most of our patients. They are lighter in weight and safer than glass. Because plastic is a softer material, a scratch resistant coating or hard anti-reflection coating is recommended.
These lenses use flatter curves towards the edge to improve visual performance. Besides improving peripheral vision aspheric lenses are also thinner and lighter. With the flatter lens, reflections can be more noticeable and an anti-reflection coating is advisable to further improve the cosmetic appearance.
This type of lens is particularly useful for those people with higher prescriptions. The material they are made from allows the lens to be made up to 33% thinner than standard lenses. Another benefit is that the lenses are are less likely to chip or break making them suitable for rimless and semi-rimless frames. These lenses tend to reflect more light and generally come with an anti-reflection coating as standard.
Many of our patients play sport and would like wrap-around spectacles. If you put standard lenses into a wrap-around frame the vision, through the lens, tends to be distorted. A sports curved lens overcomes this problem by using a steeper lens design that is individually designed for the frame. However, the prescription range for these lenses is restricted and they are unsuitable for higher powers.
Whilst progressive/varifocal lenses have largely taken over from bifocals, bifocal lenses still have there uses. Some clients, especially those who don’t wear their spectacles constantly, often find bifocals easier to use. There are many designs of bifocal, some with very large reading portions that allow for a wider field of view.
As with all forms of lens, we should be happy to advise you on your suitability for bifocals.
As our eyes age they loose the flexibility to focus at different distances. For patients who already wear spectacles for distance vision there are three choices; Wear a second pair of spectacles for reading, use varifocal lenses or use bifocal lenses.
Many patients choose progressives as they allow a seamless transition from long distance to close vision. Cosmetically they look just like “normal” single vision lenses. Whilst progressives can take a little more time to adapt to, the advantages of the gradual transition between distance and close vision soon become clear.
Progressive lenses come with a number of options, including high index, for a thinner lighter lens and colour change so that you do not have to carry a pair of sunglasses with you. Alternatively they can also be made in sunglasses with a large variety of tints.
We have well over 150 designs of lens and are always happy to advise you on the most suitable lens to meet your requirements from all the leading manufacturers. Our entry level progressive lens, Rodenstock’s Progressiv Start, is available from £89. Whilst for the the more elaborate Shamir Autograph or Rodenstock Impressions lenses start at £220.
The more advanced designs give a larger reading area and take less time to adapt to.
Plastic lenses are very strong and impact resistent. However they have a soft surface and are prone to scratching if not handled carefully. To help overcome this problem a hard, durable coating can be applied to the surface of the lenses. Whilst they are not scratch-proof, they do greatly extend the life of your spectacle lenses.
To improve appearance of your spectacle lenses an anti-reflection coating can be applied. These cut down the reflections that take place on the surface of the lens making the lens much more attractive. Because of the reduction in reflection within the lens, anti-reflection coatings reduce some of the glare from VDU screens, car head lamps and overhead lighting. Hi-index, thinner lenses, reflect more light and usually come with an anti-reflection coating as standard.
Photochromic Lenses (Colour change)
If you want to have a pair of tinted glasses always with you, but don’t want to carry a second pair of glasses, photochromic lenses are for you. Modern photochromic lenses are very advanced and reaction times for the lenses are pretty impressive. Whilst not going quite as dark as some sunglasses, they do provide help with dealing with those brighter days. Please be aware that the lenses will not go as dark in the car, or in hot countries. Some people find that they are little too dark on cloudy days. Photochromic lenses are very good at absorbing Ultraviolet (UV) light.
Whist we often use sun cream to protect our skin from the sun’s harmful radiation, we often forget that the sun’s radiation can have a detrimental affect on our eyes. Sunglasses help protect the eyes from the UV radiation which can damage the eyes.
We can tint your lenses to almost any colour that you would like. It is recommended that a UV absorber is applied to give maximum protection. Graduated tints, darker at the top and lighter at the bottom are possible. Mirror coatings can also be incorporated with on the lens. Our prescription sunglass range starts from £65 including; frame lenses and tinting..