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Measuring Varifocal heights

 

With help

  • Stand/sit in front of your assistant at eye level.
  • Wear the glasses you’re ordering lenses for
  • Your assistant vertically holds a plastic ruler against one lens
  • They align the 0mm mark with your pupil centre
  • They assess the distance to the bottom of your len.
  • Note heights according to your left & right, not theirs.

On your own

  • Stand/sit in front of a mirror.
  • Wear the glasses you’re ordering lenses for
  • Vertically hold a plastic ruler against one lens
  • Align the 0mm mark with your pupil centre
  • Assess the distance to the bottom of your lens.
  • Note heights according to your left & right

 Ocular Centre height tips

  • Only measure the lens, not the frame
  • Use a plastic ruler to prevent scratches
  • If it helps, close one of your eyes to help your focus
  • Brace the ruler against your nose & the frame/lens
  • Left & right are from your perspective, not your assistants
  • Watch your head position- keep it natural tilted back or forward will give wrong reading.