Posted by Jairo on 11/14/2019 to Progressive Lens Technology and Tips
Broken Eyeglasses, Re-Use Your Progressive Lenses
It's your Progressive Lens expert!
You've developed a crack on the bridge of your favorite pair of glasses and it's just a matter of days until they completely fall apart. You can't even replace that frame anymore because it's been discontinued or perhaps gone into the vintage category within that collection of eyeglasses.
In this case we're talking about the Robert Marc NYC 863.
Your Progressive Lenses are worth more than the frame itself and the store you went to when you tried to troubleshoot the problem and say, "Hey guys, can you replace the frame? I'll gladly buy another one".
They've told you that it's not available anymore and that you're going to have to buy an entire set of new frames and lenses because they don't want to put those lenses that are in perfect condition onto a new frame.
Today, I show you how to reverse engineer the exact measurements, the exact fit, the wrap measurement, the vertex measurement, the pantoscopic tilt measurement, the segment height (optical center height), the pupillary distances. We're going to match that while you pick a different set of frames that is very similar in shape and color and size to your original frame you had.
When other places are telling you it can't be done, I'm saying you can. This is a technique that I've been using for many many years and helping people re-use their progressive lenses. Let's cover it!
Measure the circumference on the Progressive Lenses that you want to continue using. The lenses that fit onto the Robert Marc NYC 862 have a circumference measurement of 146.53 millimeters. Write that number down because that is going to be the most important qualifying factor on which frames you can use and which frames you can't. Write that number down and we'll revisit that in a minute. Now, let's move to:
Let's narrow down the number frames that are going to be potential candidates for ones that we're going to put the lenses into. So, we want to choose frames that are going to be similar in color, similar in size, similar in shape. Once you've narrowed down the number of frames to two choices, measure the circumference of the demo lenses that are inside of those frames.
When wanting to put the lenses that were originally on the Robert Marc NYC 862, I found that there were two choices that were very very good for those and that was the Robert Marc NYC Series 1: 1007 and also the Robert Marc NYC 877. Those have the closest circumference, size, shape, and color of the frame. Always remember though, in this video we're only discussing acetate frames that are made out of a high quality Italian acetate or it can be Japanese Acetate as long as it's high quality, it will work very well.
This, for example, would not qualify because it is made out of titanium. When you have these frames, you don't have the ability to reshape them. What you see is what you get. Here, I'm holding the Robert Marc NYC Series 1: 1007. The circumference is 145.10 in millimeters. The Robert Marc 877 is also very very close. This is so awesome because we're keeping these measurements within 1.50 millimeters total, which is amazingly close and it will require very little shaping of the actual frame.
After decades of testing and reshaping Digital Progressive Lenses onto different frames, I've discovered that it takes about 3.05 millimeters of circumference to increase the width (A measurement) of the lens by 1.0 millimeter. So, pick frames that have a circumference difference of less than 3.0 millimeters. 3.0 millimeters is going to be just enough allowance to reshape the frame slightly while maintaining the quality and the integrity of the acetate.
If the equipment used to measure the circumference of the lens is the most important piece of hardware we use, then this, my friends, is the second most important piece of equipment that we're going to use to re-use your Progressive Lenses onto a new frame.
This is my frame warmer. It's the PSI ( Practical Systems Inc.) NH-320F. I've had it for a really long time. It works very well. It's an overpriced blow dryer, I understand. It has a very nice On/Off switch, also here we have a temperature switch so we can turn off and on the heat. There's a few situations, but still very useful when I want to use air but I don't want to use the hot air. Also, I have a temperature control knob right here that I can control how how it gets. Most of the time, when I want heat, I'll turn it all of the way up and just be really careful on how long I put those frames inside. But nonetheless, I have a frame warmer. This is my favorite and the one I use. When I first started in this business, I used a hair dryer believe it not.
If you're an optician in an optical, go ahead and turn it on begin by getting the new frame that you've selected that you're going to put the progressive lens in that new frame, put the right side in here and begin to warm it up. While the frames are warming up, get a marker and look at where the laser engravings are: the 180 line and mark them on the progressive lens. This is going to be very important because we want to maintain the measurements and those are going to allow us to do that.
Warning, Warning, Warning!
Warming frames up takes a lot of practice and skill so don't practice on frames you cannot replace yourself.
When the frame orbital is hot, then you insert the lens by the temporal side first and then you slide your finger and then you insert the nasal side second.
Repeat this process with the left lens but you're not done yet. Check and re-check the 180 line. It has to be perfectly straight. That axis has to be there. Remember, we're going on quality and perfection and it's the only way to do this.
Then in the wearing position, adjust the frames on the customer. This has to be the wrap measurement and let's adjust it on the customer. We have to match the pantoscopic tilt, the wrap or curvature of the frame, the vertex distance, this can be done, it just takes a little bit of time but if you're patient we can match it exactly to the original measurements.
You're done, Congratulations on re-using your Progressive Lenses from a broken frame onto a new frame that has similar measurements and similar color.
When the optician has the expertise, you'd be surprised that you have very little limitations on what is possible.
Have a great day! See You Soon!