Because of this and how bent light travels before it enters the eye,there is a complicated formula that can be used to calculate an approximate contact lens prescriptionfrom a glasses prescription, but it doesn’t always work out to be correct. You wouldn’t want to solely use that calculati...
When your prescription expires, you won't be able to buy more replacement contact lenses until your eye doctor updates it. This typically will require an eye exam to insure that contact lens wear isn’t affecting the health of your eyes and to see if you require a change in the power of...
What if I don’t have a copy of my prescription? Your prescription details can be found on the side of your contact lens box. If you don’t have your box, we’re happy to contact your eye care provider to get a copy of your prescription for you. ...
ThePDvalue (Pupillary Distance) measures the distance between your pupils, and ensures the centre of the lens is in the right place. Can’t find your PD in your prescription? Use ouronline toolfor the quickest way to figure it out. ...
An example eye prescription chart Can eyeglass prescriptions be used to buy contact lenses? Making sense of your eye prescription chart The numbers on your eyeglass prescription relate to the shape of your eyes and strength of your vision. They can help you figure out whether you havenearsighted...
Contact lenses offer freedom from glasses, complete versatility and are just as easy to wear, so throw away all of those misconceptions and scare stories and try them out for yourself. Go get your prescription checked The first thing you need to do if you’re considering wearing contact ...
Well, at one point in time, no one did. Smoking was considered glamorous and was accepted everywhere. Movie stars of the 1940s and 1950s smoked cigarettes in every scene. Even in the 1980s, smoking was still very common. But by then, some researchers were trying to figure out why cigar...
A normal BVD is 10 to 12 mm. The power of a lens system depends upon the distance of the lens from the cornea. This concept is known as ‘lens effectivity’ and explains why a myope’s contact lens prescription will be numerically weaker than their spectacle prescription. It also explains...
In the PhotoBrown and PhotoGrey products made by Corning in the '60s, the lenses were made of glass, and the molecules are distributed evenly throughout each entire lens. The problem with this method became apparent when it was applied to prescription glasses, in which different parts of the...
Contact lenses Lens solution/cleaner Prescription glasses3 In some cases, an LPFSA also lets you use pretax dollars to pay for preventive care expenses that your health plan doesn’t cover. Whether you can or not depends on the plan your employer has set up. If your plan allows it, you...