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.