Costa Glass Vs Plastic Weight

Definitely like the 580 over the 400.

Costa glass vs plastic weight. Natural glass also has a greater density than plastic. Therefore to determine the exact density of plastic it is. Weighing in at 1 19 grams per cubic centimeter this material is heavier than most plastics but is still less than half the weight of most glass which typically weighs 2 53 grams per cubic centimeter. Natural glass has a clear advantage here.

Other than the weight factor the advantages to glass are considerable in terms of vision and durability. I have 2 pairs of glass 580 s and they have zero scratches after several years. Density measures the mass per unit volume it is calculated by dividing the mass of the material by the volume and is normally expressed in g cm 3. Anon58814 january 4 2010.

It is very durable and is also impact resistant. Next in the category is the plastic which is normally preferred over glasses for being light weight and thus gives added comfort. Even when the refraction index is the same spectacle lenses made of glass are always thinner than. Costa glass lenses vs costa polycarbonate lenses.

If you re looking for the highest optical quality glass is the way to go. When buying your new pair of costa sunglasses its key to understand the differences between their glass and polycarbonate lenses. The density of a plastic sample may change due to change in crystallinity loss of plasticizers absorption of solvent etc. While glass lenses won t exactly weigh you down they are significantly heavier than polycarbonate plastic twice as heavy in some cases along the same lines plastic lenses are less bulky than glass ones.

Distortion of the face is purely determined by your prescription the amount that light has to be bent for you to see correctly. Plastic vs glass has nothing to do with this. It is important to note that density varies with temperature. I went with the 580 glass because my poly ones were getting scratched up when i was on the water.

All costa lenses have 100 uv blockage for maximum protection and 100 polarization to kill reflected glare. This article is really bogus.