Reading glasses - #D READING Tortoise: reading glasses for presbyopia, round, timeless, best-selling shape. Unisex, universal model. Original, fashionable design. High-quality, lightweight, comfortable reading glasses: flexible arms, rubber texture... essential for everyday life. Give yourself a fashionable edge! Standards This model complies with the European standards for non-prescription glasses (NF EN 14139) and with the international standards for prescription glasses (IS0 12870). Magnifying glasses For presbyopic people, seeing clearly requires at first an additional effort and then becomes, little by little, impossible. It is then necessary to wear reading glasses to see closely. Flex hinges Flexible and comfortable arms, with spring hinges, which adapt to all face shapes and sizes. Presbyopia is a natural phenomenon linked to aging of the eyes which diminishes the vision from the ages of 40-45 onwards. More precisely, it relates to the natural weakening of the power of the lens to adjust (the transparent lens within the eye) during reading. Presbyopia causes diminished vision when reading smaller letters and when in insufficient lighting conditions. When someone begins to suffer from presbyopia, they are first forced to hold the reading material further away and look for better lighting. Then they will need to carry glasses with them for reading.