Does anyone have or know where I can get a Burton gaugemaster or similar gauge to check lensometer power accuracy? I tried Barry Shepherd but he had none available right now.
Does anyone have or know where I can get a Burton gaugemaster or similar gauge to check lensometer power accuracy? I tried Barry Shepherd but he had none available right now.
oddly in the past I used to keep a couple of glass lenses around for just this occasion.
Call your lab, they will sometimes come out and take care of this for you.
Use some trial lenses. My feeling is, if the Doc's can refract with them, I can check with them.
I have a set of glass lenses that I made years ago for this. +6.00, -6.00, PL-2.00 ( one for 90 - 180 and one for 45 - 135), and PL w/4^ prism. I set flats on them with lapidary equipment so they would set right during testing. Works great, cheaper than a gaugemaster.
These folks were able to help a few months ago.
http://www.norville.co.uk/gaugemaster-7540-0.html
http://www.rhburton.com/index.php
I use trial lenses, but used multiple powers to check so that there is less chance for error.
I always head into the O.D.'s office and borrow a few trial lenses. I usually test in three dioptre increments from +6.00 to -6.00.
Clinton Tower
The intellect to live free is in short supply
ALT248=°
Funny how we all think 'glass' for greatest accuracy, yet sell very little of it to our customers/patients.
-Tony
There have been several companies recently advertising them. You may want to consider the cost as it may not be worth the expense for you. Last I saw it was over $650 UDS plus shipping of about $50.00.Originally Posted by edk68
Does anyone have or know where I can get a Burton gaugemaster or similar gauge to check lensometer power accuracy? I tried Barry Shepherd but he had none available right now.
What you need to understand is the Gaugemaster has a -12 and +12 because the B&L Vertometer (and maybe others) is calibrated using a 24 diopter spread across the Standard Lens. I say this as I only specialize in the B&L model 70.
If the 12/12 is not in proper calibration then your -6 and +6 does not matter, as those, and other readings, will be incorrect. If you're really concerned with having your equipment doing what it was designed to do, you may want to keep in contact with me.
It just depends on how critical you are, and how much you value your customer satisfaction. Your work can only be as good as your equipment and your talents can provide.
woot!!
Well somebody's selling it because we're doing 150~200 glass jobs per day.....and that's growing.
The optics are great, but there are other issues with glass, some real (like greater weight), and some only percieved (they break easily and aren't safe).
There are rules. Knowing those are easy. There are exceptions to the rules. Knowing those are easy. Knowing when to use them is slightly less easy. There are exceptions to the exceptions. Knowing those is a little more tricky, and know when to use those is even more so. Our industry is FULL of all of the above.
I have both the Younger and a Burton, and will sell either or both. Originally $750 each asking $375 plus shipping
Hi Specialist, please contact me regarding lensometer accuracy and calibration; Quest Lab, questopticallab.com or questlab@tampabay.rr.com Thanks, Michael
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