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What is the segment shape of bifocal lenses?

April 26, 2017bifocal lenses segment shape

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What is the segment shape of bifocal lenses?

2 Answers

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As standard we use D28 bifocal lenses. These are 28mm wide “D” shaped segments that are positioned vertically 3mm below the centre of the lens and horizontally are centred on your pupillary distance. If you would like them to be positioned further up or down (higher or lower) then do state on your order or contact us to discuss your needs. We can also make up D35 bifocal lenses which at 35mm are slightly wider, and executive bifocals that stretch across the whole width of the lens. If you would prefer either of these options then contact us for an individual quote.

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The standard size is D28 – these are 28mm wide ‘D’ shaped segments that are positioned 3mm below the center of the lens vertically and they are centered on your pupillary distance horizontally. If you need them to be positioned further up, please state this on your order form.