What does 1.61 index lenses mean?
The 1.67 high-index lenses are very thin, even surpassing the 1.61 high-index lenses. This lens index is
Index lens)-It is suitable for prescriptions of SPH ( ±4.0 to ±6.0 ), CYL(0 to ±2.0). If you’re looking to tint your lenses to a dark shade, you can’t achieve this with high-index lenses. Because of its density, it can’t be tinted to any other thing more than a light shadow. Polycarbonate includes a coating that allows it to be tinted significantly darker than high-index. Most people can’t perceive the colour distortion at these levels.
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Polycarbonate 1.59 index lenses are a thin and lightweight material, that is very resistant to impacts. This material is so tough and shatter resistant that it is also used to manufacture airplane windows. Polycarbonate Lenses are perfect for rimless frames or anyone utilizing their glasses for sporting activities. If you are short sighted you might require glasses for distance, whereas an extended sighted person would require glasses for reading.
If your prescription isn’t quite as extreme , polycarbonate is a superb choice. As a rule of thumb, should you have a solid prescription, high-index may be the way to go.
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