Monday, March 22, 2010

Optical information on eyeglasses

Before thinking to purchase any type of eyeglasses it is good to have some knowledge about the optical field therefore notions like astigmatism, anti-reflecting coatings, refractive index, lens aberrations, all these are terms that characterize the quality and the defects of an optical item. Usually the production of the optics is pretty expensive due to the high finesse and the advanced quality control methods involved. Hence, it is obvious that the pricing is an important factor to keep in your mind. Some merchants advertise cheap UV eyeglasses but in most cases the customers discover that they are made of plastic which in fact does not stop the UV radiation, therefore this example let you know that the glass is actually the material that lets the visible spectrum pass through and obstructs the UV radiation. It is recommendable to read the comments on the internet and here one of the most relevant is Eric’s Review of Zenni Optical. One of the nicest glasses are those with thin full-rim frame because they confer a kind of business type and a serious attitude for anyone. Sometimes it is tempting to choose famous expensive brands but like most of the people, I prefer to opt for the Lowest Price Progressive Glasses. It is a bit difficult to fit this compromise because normally higher the price higher the quality but once I spent about 15$ on a good quality glasses. Initially just did not expect a high quality product but I ran a little experiment in a laboratory (at the working place) by placing the eyeglasses across the pathway of a laser radiation centred at a wavelength of 266 nm (UV light) and verifying the materials they were made of. Surprisingly the item turned out to be made of glass after seeing that the UV laser light was blocked. The #1 online Rx glasses store comes up with the most competitive and attractive prices especially now before the sunny season is about to start. In general I own two pair of glasses and I like the design as that in the figure:


Enter a long URL to make tiny:

  © InfoWebExplore Amsterdam 2009 by Daniel Irimia

Back to TOP