Measuring Varifocal heights
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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.
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