The narrow 0.5 mm viewing slot ensures the patient’s natural line of sight is maintained. This is like looking through a pinhole camera as the patient can only see through the slot when it is precisely positioned directly in front of the pupil. The Perfect Fitting Height with no parallax errors or height discrepancies.
Pupil Height
Have the patient sit or stand with normal posture.
Instruct patient to look straight ahead and maintain their gaze.
Use a business card or occluder to cover the eye not being measured.
Position tool against glasses with the viewing slot below the pupil, while reminding the patient to continue looking straight ahead.
Instruct the patient to let you know when they can see through the viewing slot as you slowly move the tool upwards.
Record the pupil height measurement where it intersects with the lowest part of the eyewire/frame/lens.
Repeat to verify your measurement.
Flat Top/Bifocal Height
Have the patient sit or stand with normal posture.
Position tool bottom edge of the tool against glasses, while reminding the patient to continue looking straight ahead.
Position the lined bifocal measuring edge horizontally along the lower eyelid or in accordance to the fitting requirement for the lens type.
Record the seg height measurement where it intersects with the lowest part of the eyewire/frame/lens.
Repeat to verify your measurement.
Using The Adjustment Channel
Heat the temples prior to making any adjustments.
Align the location of where you would like to make your bend in the temple groove.
Brace the temple along the top of the tool.
Slowly bend the temple downwards along the adjustment channel.
Using The Adjustment Ledge
Heat the temples prior to making any adjustments.
Align the location of where you would like to make your bend along the curved ledge.
Brace the temple along the top of the ledge.
Slowly bend the temple downwards along the ledge.
