ask the labs
Facts & Speculations
by Karlen McLean, ABOC, NCLC
DERAILING DISTORTIONS
Q What procedures should labs use when checking for lens distortions?
A Once the lens is mounted in the frame, we take a three-step approach. First, we put the eyewear in the lensometer and check for power issues.
This includes the usual verification that ECPs should do in their offices, plus moving the lenses a little off center for in-depth power verification.
Second, we check different points along the reference line.
Third, we visually inspect the job. Coatings are becoming a bigger and bigger issue, so we visually check front side and backside coatings and also check for distortions in the AR coating. This is done using a high-intensity halogen lamp against a dark background.
— Daniel Singer, president, Ultra Lens Optical Laboratories, Fort Lauderdale, Fla.
TRANSFORMERS
Q What do you think are the most earth-shattering, lab-related events of the past several years that will impact the future of how optical does business?
A Vertical laboratory integration tops the list. It has changed relationships and decisions with all sectors of the optical business. Electronic integration between the practitioner, labs, and vendors has changed the way we do business and the way we process orders.
In-lab capability to do AR coating and automatically route business off-site without ever seeing the order has and will continue to make an impact.
Automation of edging, drilling, edge polishing, and digital surfacing technology will continue to change our business as well.
| RAGGED edge |
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| Q Even with modern tools, sometimes when shortening screws that are too long, we get a ragged one. How can we avoid this? And if it happens, what is an effective way to fix it without damaging the lens or frame? A While screw-mounted rimless frame usage is on the decline as more and more manufacturers opt for plug-type mounting systems, there remains newer stainless steel screws. When stainless steel screws are cut, they leave a nasty burr. The older spoon files do not work well for burnishing stainless steel screws. There are some vendors who supply electric diamond files specifically for stainless steel applications and tough burr removal use. Another alternative would be to use cap nuts. — Chris Bowers, operations manager, Walman Optical, Minneapolis |
Finally, growth of all third-party providers and buying groups has and will continue to change the optical landscape.
— Ron Schlotzhauer, vice president south central region, Essilor Laboratories of America
If you have a question you'd like to have answered in Ask the Labs, send it to Karlen McLean. E-mail: mcleank@lwwvisioncare.com. Fax: 215-643-1705. An archive of past Ask the Labs columns can be found on the Eyecare Business website at www.eyecarebusiness.com.
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