If you have a high strength prescription, (a sphere (SPH) reading higher than +/-3) a precise PD measurement is very important.

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If there are 2 PD measurements shown on your prescription, such as 63/60, this will mean that the 63mm figure is for distance use and 60mm will be your reading or computer PD. AN EXCEPTION TO THIS IS IF YOU'RE MEASURING YOUR PD YOURSELF (Please see above, towards the end of the section: 'How can I find out my Pupillary Distance Measurement? Lenses are impact-resistant polycarbonate and feature a hydrophobic coating that repels water droplets, including dirt, salt, and oils in that water. Featuring ZEROFORM frame material for comfort fit, no-slip PSYCHOTECH contact points and HYDROFREAK lenses for optical polarization and enhanced UV protection. New with tags: A brand-new, unused, unworn and undamaged item in the original packaging (such as the .

These rectangular shades offer optimum protection against wind and glare, thanks to their wraparound design and hydrophilic rubber grips at the tips of the arms for added stability behind the ears. These lenses also provide reliable UV protection, safeguarding the wearer's eyes from the sun's harmful rays.The CYL figure helps to correct an Astigmatism - which means the eye has problems focusing at particular angles.