Posted by Jairo on 8/23/2019 to Progressive Lens Technology and Tips
How Prescription Sunglasses Are Made
Transcript of Video:
I'm taking you on a step by step process on how we get Prescription Polarized lenses into either your favorite sunglasses or some of the sunglasses that we have at our store.
This is the one that Jason chose, but it doesn't have the prescription lens, yet.
Now, I'm going to take all of the measurements that I took, accurate to the 1/10th of a millimeter and I'm going to cut them into this frame!
In order to get measurements that are 25 times more accurate than what anybody else can do, I remove the lenses from the sunglasses and then I add this futuristic looking contraption here. The green squares mean that I'm just far enough away and now we're going to take three measurements:
Vertex Distance (distance from the lens to the Cornea)
We're also going to measure: the Pantoscopic Tilt,
and we're also going to measure: the Wrap of this frame.
We now plug the pupillary distance measurements accurate to the 1/10th of a millimeter. We also plug in the elevation of the optical center accurate to the 1/10th of a millimeter.
And then we're going to block the lens so that the lens is in place while the edges are being cut in the shape is being cut into the lens.
These are the original ready-to-wear lenses that are polarized green mirror and they have a non-reflective treatment on the inside.
And these are the Progressive Polarized Prescription Sunglasses. They have a +1.25 Diopters at the distance and then they have a +2.50 reading power at the reading level.
They also have a Non-Reflective treatment on the backside.
Look at this! You can't even tell that they are Prescription!
It's impossible to tell.