What are the markings on my progressive lenses?
Progressive lenses are supplied with two types of markings for layout, power verification, dispensing and identification purposes. Permanent markings, which are engraved upon the surface, provide the identification and add power of the lens, as well as locator marks to reapply the ink markings when necessary.
How do I identify Varilux lenses?
How do I know that I have genuine Varilux lenses? Varilux lenses are supplied from the manufacturing laboratory with a Varilux lenses Certificate of Authenticity (COA) card. If you do not receive a COA card with your Varilux lenses, please consult your eyecare professional.
What do the markings on eyeglass lenses mean?
The markings are there for the optician or laboratory to be able to identify the major fitting reference points on the lenses so that they can be placed in the frame properly. The markings can also be used to identify fitting issues if a wearer has a visual problem after the glasses are dispensed.
What is a progressive eye lens?
Progressive lenses have three prescriptions in one pair of glasses. That allows you to do close-up work (like reading a book), middle-distance work (like checking out a website on a computer), or distance viewing (like driving) without needing to change your glasses. They’re sometimes called multifocal lenses.
What are the little numbers on my glasses?
1) The eye size number (it is the size of the lenses on your frame). 2) The bridge size number (the distance between the lenses). 3) The temple length number (it is the size of that part of your eyeglass frame, which rests upon your ears).
How can you tell if a lens is crizal?
How do I identify genuine Crizal Lenses? Crizal Lenses will have a unique Fog ID on the lenses. This can be identified by fogging the lens. Each of our Crizal products has differentiated FOG ID for your easy understanding.
Why do I see numbers on my prescription glasses?
These numbers are the measurements that indicate and describe the size of your eyeglass frames, specifically: 1) The eye size number (it is the size of the lenses on your frame). 2) The bridge size number (the distance between the lenses).
What is the minimum lens height for progressive lenses?
28-30mm
The minimum fitting height for progressive lenses is 28-30mm. This will allow proper room in each part of the lens so that you can see your best, whether you’re driving or using your computer.