Frequently ask questions

We’ve compiled a list of commonly asked questions for your convenience. If you are unable to find the answer to your question, please contact us for further assistance. It’s just one more way Vazeer makes it easy to get eyeglasses you’ll love.

Prescriptions (Rx)

  • If you need glasses, your eye doctor will provide you with a prescription for corrective lenses. Eyeglass prescriptions may be written in different ways, though most are either printed or handwritten in horizontal rows. The first row is the prescription for the right eye (OD), and the second row is for the left eye (OS). Within each of these rows are three values: Sphere (SPH), Cylinder (CYL), and Axis. The SPH number corrects for nearsighted [indicated with a minus (-)] or farsighted [indicated with a plus (+)] vision. The CYL number and AXIS number correct for astigmatism. You may also have another field labeled as ADD which corrects for the reading power used in a bifocal or progressive lens. To learn more about how to read your prescription, Lastly, eyeglass prescriptions sometimes include the pupillary distance (PD) measurement, which is the distance between your pupils. PD is needed to determine where the optical center of the lens will be for clear, accurate vision. If your prescription does not include your PD, you can measure it yourself with our guide. An eyeglass prescription will usually expire in 1-2 years, depending on which state you received your eye exam.

Here is a list of some optical abbreviations that will help you order your glasses from Vazeer Optical:

ADD (also NV-ADD): the Near Vision (NV) Reading ADDition correction on a multifocal Rx. Can be used for bifocal or progressive glasses, or for single-vision reading or computer (intermediate) vision glasses.

Near Vision Reading Addition

AR: Anti-Reflective. A coating that reduces reflection on the lenses.

AXIS: the angle at which the Cylinder (CYL) is placed on a lens to correct an astigmatism. It ranges from 1 to 180.

BAL: the Rx calls for balance lenses, meaning the same Rx for each eye. Often used when a person has no sight in one eye, so both lenses will have the same thickness.

BD, BI, BO, BU: a prism correction on your Rx (may be indicated with Δ, and one of these four abbreviations. The B stands for base, and it could be base down (BD), base in (BI), base out (BO), or base up (BU).

CYL: the Cylinder. Combined with the AXIS, the CYL corrects an astigmatism.

DS: the abbreviation for diopter simplex. An eye dr. may write DS on an Rx in the Cylinder (CYL) field if no astigmatism correction is needed.

DV: distance vision.

FT: flat-top bifocal.

NV: near vision.

NV-ADD (also ADD): the Near Vision (NV) Reading ADDition correction on a multifocal Rx. Can be used for bifocal or progressive glasses, or for single-vision reading or computer (intermediate) vision glasses.

OD: Latin for Oculus Dexter, meaning the right eye.

OS: Latin for Oculus Sinister, meaning the left eye.

OU: Latin for Oculus Uterque, meaning each eye.

PAL: Progressive Addition (or Adjustment) Lens: sometimes on a Progressive Rx an eye dr. will write two different numbers for the NV-ADD, perhaps +2.25 and +2.50, to increase the reading power in the NV-ADD for Progressive lenses.

PD (Pupillary Distance): the PD is the measurement of the distance between your pupils. This is needed for the manufacturer of the eyeglasses to know where to place the optical center on each lens, so you can see well with the glasses.

PL: Plano. Latin for “flat.” If this is in the SPH section of an Rx, it means no nearsighted or farsighted correction is needed.

RX: a prescription.

SPH: the first section on an Rx. It corrects nearsighted or farsighted vision.

UV: the abbreviation of ultraviolet. UV light is invisible to the human eye, but it is UV light that gives us a sunburn, and too much exposure to it can damage the eye. All of the lenses Zenni Optical offers come with 100 percent UV protection, for free.

VA: Visual acuity: how well the eye can see. Sometimes this may be written on an Rx, with a number such as 20/20. This would indicate that with eyeglasses made to this Rx, the vision would be corrected to 20/20 vision.

Your pupillary distance (PD) is the measurement of the distance between your pupils.

You bet we can!

Single-vision Rx:

Up to -20.00 or +12.00 on the Sphere (SPH

Up to + or – 6.00 on the Cylinder (CYL).

Bifocal Rx:

Up to -9.00 or +6.00 on the SPH.

Up to + or – 6.00 on the CYL.

Up to +3.50 on the NV-ADD.

Progressive Rx:

Up to -10.00 or +8.00 on the SPH.

Up to + or – 6.00 on the CYL.

Up to +3.50 on the NV-ADD.

Prism (single-vision only):

Up to 5.00 in any base direction.

Most people have an astigmatism. If you have an astigmatism on your Rx, we can make glasses that will correct it.

Yes! We offer both. If you have ADD or NV-ADD on your Rx, you can get lined bifocals or unlined progressive glasses.

Ordering single vision distance glasses through Vazeer is easy! Once you have selected a frame, click “Order Glasses” and follow the below steps:

1. First, indicate that you would like distance glasses by selecting “Single Vision” from the Prescription Type dropdown.

2. Next, you’ll need to input a Single or Dual PD (pupillary distance) under the Pupillary Distance dropdown. Check your prescription to see if your doctor measured it and wrote it down. If not, you’ll need to measure it yourself. 

3. The last step is to enter the distance prescription for the right eye(OD) and left eye(OS). Most glasses prescriptions are considered distance single vision unless your doctor noted it was for reading or computer.

Ordering reading glasses through Zenni is easy! Once you have selected a frame, click “Order Glasses” and follow the below steps:

1. First, indicate that you would like reading glasses by selecting “Single vision” from the Prescription Type drop-down.

2. Next, you’ll need to input a Near Single or Dual PD (pupillary distance) under the Pupillary Distance dropdown. For a Single PD, if you were only given one PD measurement, it is most likely for distance so you will need to subtract 3 to calculate your near single PD. If you were given a dual PD, two numbers – one for the right and left eye, you’ll need to subtract 1.5mm from each number to calculate the near dual PD. Ex. If given PD= 63mm then Near PD= 60mm.

3. The last step is to enter the reading prescription for the right eye and left eye. If your doctor didn’t write out a separate reading prescription then you’ll need to calculate it yourself. You can do this by adding the ADD value to the SPH value and keeping the remaining values the same, as in the example below:

how to convert prescription into reading glasses prescription

You bet you can! Divide the NV-ADD in half. Add one of the halves to your SPHs. Leave the other half in the NV-ADD. This creates computer vision in the top of your lens, and reading vision in the bottom!

how to order bifocals

Yes, we can fill prescriptions with prism correction in single-vision lenses only. You will enter in the values for each eye in Step 1 of the order process according to the script given by your doctor. After you fill in Sphere (SPH), Cylinder (CYL), and Axis numbers for each eye, you will click “Yes” under Prism Values. You will then select your Prism Horizontal (for Base In/Base Out) and Prism Vertical (for Base Up/Base Down) values in diopters and indicate the direction for each value on your prescription for each eye.

Sorry, a contact lens Rx can only be used for contact lenses.

It’s super easy to order Non-Rx glasses from Vazeer Optical. After clicking on the Order glasses button, select Non-Prescription in the Prescription Type drop-down window. During the ordering process, you can turn them into sunglasses.

We strongly recommend that you get an eye exam every two years, or more frequently if you notice that your vision has changed.


The Lens Index number (1.50, 1.56, 1.59, 1.61, 1.67, or 1.74) refers to the degree of refraction the lens provides. This means how much the light that enters the lens is refracted (bent) as it passes through the lens. Lens Index is also related to the thickness of the lens. The higher the index, the thinner the lens will be.what index is best suited for your Rx, lifestyle, and frame selection.

What are lens index number mean?

The lens that is preselected as a recommended option in ② Your Lenses during the ordering process will be the best option for your Rx. If you have a strong Rx, a higher lens index number will give you a thinner lens.

Yes, we offer aspheric lenses for our standard 1.67 high index and Blokz 1.67 high index lenses. Aspheric lens surface improves visual quality and reduces distortion of the wearer’s eyes as seen by others.

Aspheric lenses are provided for the 1.67 high index lenses in this range: Sph 0 to -10.00, Cyl -2.00 to +2.00

All Vazeer Optical eyeglasses come with Anti-Scratch Coating and UV Protection Coating that are both absolutely free. We also offer Anti-Reflective (also known as Anti-GlareCoatings, which reduce reflection on the lenses and the glare you see while you are wearing your glasses.

We also have Premium Coating Lenses Which are :

Swiss Blue Technology

Smart Glow Technology

Photochromic lenses are specially treated to turn dark when exposed to UV light. When the lenses are out of the sunlight, they become clear again. We carry the Transitions® brand of photochromic lenses for our 1.50, 1.61, and 1.67 lenses, for both single-vision and progressive glasses.

What are photochromic lenses?

Polarized lens is a sunglass lens that greatly reduces the glare from light that is Polarized horizontally, meaning the light reflecting off horizontal surfaces, such as a white sidewalk, a white-sand beach, snow, or sunlight reflecting on water.

What are Polarized lenses?

Polycarbonate lenses are impact resistant, and are stronger and more lightweight than standard lenses, which makes them a great option for kids’, rimless, and sports glasses, or for anyone who is rough on their glasses.

Trivex® lenses are impact-resistant, and are stronger and more lightweight than standard lenses, which make them a great option for kids’, rimless, and sports glasses, or for anyone who is rough on their glasses. Compared with polycarbonate lenses, Trivex® is a premium material that provides crisper vision and is 10% lighter.

Trivex is a registered trademark of PPG Industries Ohio, Inc.

Do you want a tint to make your glasses into dark sunglasses?
– We offer 3 sunglass tints: Dark Gray, Dark Amber, and Dark Green.

Do you want a tint that is darker at the top, and gradually gets lighter towards the bottom?
– We offer gradient tints in Gray, Amber, Green, Blue, Purple, and Pink.

Do you want a tint that is lighter, or more colorful to enhance the appearance of your everyday glasses?
– We offer fashion tints in Gray, Amber, Green, Blue, Fuchsia, Lavender, Orange, Rose, Yellow and Red.

After selecting your frame and lens material you can add your favorite tint from 3 categories listed above – Sunglass, Gradient or Fashion Tints.

Our sunglasses tints – dark amber, dark grey, and dark green are 80% darkness. Our gradient tints start with 80% darkness on the top of the lens with an even gradation to 10% darkness at the bottom of the lens. Our fashion tints come in various levels of 10-50% darkness.

Polarized lenses are known for cutting out glare and light intensity which is very noticeable when light reflects off of water, snow, and sand. Dark lens tints are known for only cutting down the intensity of light. Some instance where dark tints are beneficial over polarized lenses is if you are using a digital screen outdoors. This is because polarized lenses will darken your view of the screen. Polarized lenses are known to improve visibility with driving, especially in severe weather conditions, therefore making you a safer driver.

Mirrored lenses are created with a highly reflective coating that reduces glare by reflecting light away. These sunglass lenses are highly functional yet also fashionable.

Vazeer offers 3 different mirror colors: Silver, Red, Green.

To order a mirrored sunglass tint, you must first select a standard or gradient base tint, or you can select a glare-reducing polarized lens for premium sun protection.

Yes, We do have night driving lenses technology which is :

Smart Glow Technology