Tuesday, September 1, 2009

Guideline about eyeglasses, goggles and optical items

When deciding to buy eyeglasses, goggles, etc it is recommended to have some knowledge about the optics field therefore notions like coatings, refractive index, lens, aberrations, all are terms that describe the quality and the defects of an optical product. In general the manufacturing of the optics is not cheap because of the high finesse and the advanced quality control techniques involved. It is clear that the pricing is an important factor to keep in your mind. Some vendors advertise cheap UV eyeglasses but many times the customers figure out that they are made from plastic which in fact does not block the UV radiation, therefore in this example is worth to know that the glass is actually that material that lets the visible light pass through and obstructs the UV spectrum. How You Can Start Spending Smart depends on many factors such as income, personal taste, needs, etc but some tips can be easily found on the internet.Personally I like mostly the glasses 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 purchase quality glasses at a low price for example the $ 8 Rx eyeglasses. It is a bit difficult to match this compromise because in general higher the price higher the quality but last time I spent less about 15$ on a good pair of glasses. Initially just did not expect a high quality product but I performed a little experiment in a laboratory (at the working place) by putting the eyeglasses across the pathway of a laser radiation centered at a wavelength of 266 nm (UV light) and checking 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. In general I own two pair of glasses and My favorite high fashion eyeglasses look mostly like those seen in the following pictures.

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