Here are a few frequently asked questions and answers regarding replacing Sunglass Lenses.
Q 1. If I’ve bought a new designer sunglass frame online, can I have prescription sunglass lenses put in? Yes this is very easy to do. As there are no prescription lenses in the frame already we need to know your PD eye measurement to make the lenses correctly. Occasionally people know this, but if not you can enclose a pair of your old glasses for us to read the measurement from. We’ll return the old pair along with the newly glazed glasses.
Q 2. Can I have different coloured lenses to the ones already in the frame?. Yes, you can have any colour you wish in either a full lens tint or graduated tint. Graduated tints cost £10 extra as they are very time consuming to make.
Q.3 I go fishing a lot, am I better wearing polarized lenses?. Yes, they will certainly help see below the surface of the water better than normal sunglasses. Brown polarized lenses are the better option as they reduce the blue light, enabling you to see the fish more clearly as well as everything else below the surface. See question 7 below for more information about polarized lenses for fishing.
Q 4. I have a fairly strong prescription, will I still be able to have prescription sunglass lenses? Probably yes. The lenses would be more expensive than standard sunglasses, but most prescription are fine to be made up as sunglasses.
Q 5. I have a half rim frame that I’d like new lenses put into, however I’d prefer the lenses to be a bit longer in depth. Is this possible? Yes this isn’t a problem. We often lengthen the depth of lenses, particularly if varifocal lenses are wanted. It’s also a good way of making the lenses bigger for sunglasses. There is no additional cost for making the lenses longer in depth.
Q 6. Can I get replacement lenses put into the inserts of my my skiing or cycling goggles? Yes, it’s very easy and costs just £35 for standard low prescriptions. The cost for stronger prescription would depend on the strength of the prescription but would still always be a very competitive price.
Q7 . What’s the difference between standard sunglass lenses and polarized lenses? Sunlight is absorbed or reflected in many directions. Sunlight reflected from a horizontal surface, like land, water or hoods of cars is often reflected back horizontally, producing a very strong glare. For us, it means that ground reflections cause a lot of interference with our vision on water or pavement.
Normal sunglasses provide basic protection against both vertical and horizontal UV rays. However, they don’t diminish the glare from reflected horizontal rays.
Polarized glasses have a built-in, laminated filter that permits only vertical light rays to pass through, and almost totally blocks horizontal rays to eliminate glares. This is most noticeable when boating or fishing, since you can suddenly see through the surface, which was previously clouded by the reflections from the sun and sky above.
Who Needs Polarized Lenses?
The people who find the greatest use for polarized lenses are those that work around or on the water, like fishermen and boaters. Because such lenses reduce glare, it is easier for fishermen to view deeper into sea for fish or any obstacle.
This can make a huge difference in fishing, since an angler can get a more accurate look at fish habitat. For a boater, this can mean the difference between life and death, since they are able to perceive underwater obstacles, and the more complex movement of under water currents.
These aren’t the only uses for polarized lenses. Consider driving, especially on road trips in the summer: horizontal rays of light are constantly refracted from the road, increasing eye fatigue and discomfort. You can instantly reduce this glare with polarized glasses.
Any activity that involves rapid changes in lighting conditions, such as hunting under the heavy canopy of a forest, may benefit from polarized glasses, since they also partially eliminate the glare of light directly on the glasses.
Pros and Cons of Polarized Lenses
A high quality pair of sunglasses may include polarized lenses. A polarized lens offers the following advantages over non-polarized lenses:
- Increases visual comfort. Since your eyes aren’t constantly challenged by glare, it is easier to view objects in bright conditions.
- Enhances clarity of vision and contrast for ground level objects and for seeing into water.
- Reduces eyestrain. Frequent adjustments to the glare from reflections is taxing on the eyes and can lead to eye fatigue.
- Conveys colors faithfully.
- Diminishes reflections and glare.
- Polarized lenses make it difficult to view LCD screens. They create the effect of making the images on the screen disappear at certain angles. Pilots or operators of heavy machines are discouraged and often prohibited from using polarized lenses. You might have difficulty operating an ATM with polarized glasses.
- Though recommended for skiing, they may actually compromise contrast in certain light conditions, making it difficult to distinguish between patches of ice or snow and moguls.
- Glasses with polarized lenses are generally more expensive than regular lenses. This additional investment is worth it for those who really do need polarized lenses, but might be an unnecessary expenditure for people who just need regular sunglasses.