The white pen pupil marker is used to mark the centre pupil location on the spectacle frame demo lens or the patient's existing lens in order for the dispenser to accurately measure for the fitting of progressive lenses.
Pupil Marker's acid free white dot is designed to show up distinctly in front of the backgroundof the patients black pupil.
The white pen pupil marker can also be used to mark the engraved markings on polarised or darkly tinted progressive lens.
