organic lenses are composed of organic polymers. They are popularly known as plastic lenses, although the polymers used are selected by their optical and physical properties.
refractive indices, as we saw in the previous post, is the indicator of the reduction of the lens are different from the minerals lenses, and may differ depending on the home than the market, this happens in cases of high rates. The lowest lens corresponds at a rate 1.5 (material known as CR-39), and we can find the 1.56, 1.6, 1.67, 1.7, 1.74 and finally the 1.76 organic lens is smaller than currently exists.
For organic lenses and light weight reduction if they are united, unlike the mineral lenses, but as was the case with these, increasing the reduced optical quality is usually worse, becoming more apparent aberration spherical when we look at objects at the edges of the lenses (see objects with colored shadows.)
The advantages organic lens are its lightness and resistance impact.
Its great drawback is its ease of scoring , to avoid this treatment appeared to harden the lens, making it more resistant to scratching, but eventually end up scratching before a mineral lens. Despite this, and thanks to the firming treatments organic lenses are the lenses of reference in recent years.
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