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To achieve a good cosmetic result, acceptable to the wearer, it is necessary to choose a reasonable lens shape and size-keeping the decentration to a minimum both horizontally and vertically. the most approprate lens material should also be selected. however, there is no real point in using an expensive high index material, with it’s weight and colour problems, for low prescriptions-but the use of a mid-index(1.6) material can be warranted in these cases. Keep the higher indices for those really strong prescriptions-they can really achive a good result, when used in a suitable frame with reasonable centration.
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