PD's and The Very Young

By Danielle Crull, ABOM, A Child's Eyes
Tuesday, April 22, 2014 11:30 AM The very young can be quite difficult when taking a pupillary distance measurement.

Still Using A Ruler?

By Mark Mattison-Shupnick, ABOM
Monday, December 10, 2012 8:16 PM Are you using a millimeter ruler for PDs and fitting heights; does it define your expertise?

Clinical Tips

By Palmer Cook, OD
Friday, November 16, 2012 5:54 PM Clinical Tip When fitting multifocals, especially in higher powered Rxs, although you normally place the MRPs or optical centers at unequal decentrations to agree with unequal monocular pd's, you may wish to equalize the decentration of the segs for a better cosmetic result.

Monocular PDs

By Palmer R. Cook, OD
Friday, November 16, 2012 4:58 PM Whether you call them monocular PDs or half PDs, they are a refinement in data gathering that can help you supply better performing eyewear to your patients. Monocular PDs are important.

Bench Alignment Revisited: Embracing a New Approach for Personalized Lenses

By Barry Santini, ABOM
Monday, September 17, 2012 7:36 PM Traditionally, before eyewear was delivered to an awaiting client, it underwent an evaluation and correction procedure intended to make sure it complied with a concept called "bench alignment."

'How Can I Make Seg Heights and Progressive Verification Easier?'

By Michael Goodwin LDO, inventor, and CEO of The Pupil Marker
Tuesday, July 31, 2012 2:51 PM There is a new twist on the old subject of measuring seg heights and progressive lens verification. The "twist" is The Pupil Marker, sometimes known as the "white pen."

Do More Patients Complain About Having to Lift Their Chin to Read?

By Staff
Sunday, January 1, 2012 10:53 PM When patients complain that they need to lift their chin to read, it may suggest that the eyes of the optician, dotting pupil center, is consistently too low.

Picture Perfect PDs

By Staff
Monday, November 7, 2011 4:04 AM Learn more about accurate PDs.

Digital Measurements

By Staff
Tuesday, November 1, 2011 1:49 AM Since new lens design trends will require more personal measurements, it places a new demand on the doctor and optician.

Segment Height

By Staff
Monday, October 31, 2011 7:13 PM Multifocals and progressives have specified fitting heights.

Taking PDs

By Staff
Monday, October 31, 2011 7:00 PM A PD is the distance between the visual axes of the two eyes. It can be measured manually with a ruler or automatically using a pupillometer.

Fitting Height Considerations

By Mark Mattison-Shupnick
Monday, October 31, 2011 6:28 PM Precise segment and progressive fitting heights, first time, teach patients that you understood their vision needs.

Quick PD and Height Reference Guide

By Staff
Monday, October 31, 2011 5:16 PM Use this quick reference to fit modern lenses. If your own techniques are different, consider these changes, they incorporate the fitting of digitally enhanced lenses.

Dissimilar Fitting Heights

By Staff
Monday, October 31, 2011 3:59 PM Eyes are at usually different heights. For centering, this should be taken into account as follows. In progressives, order dissimilar fitting heights.