FREQUENTLY ASKED QUESTIONS
- How to read my Prescription?
First you should go to your eye-doctor to check if you need glasses and provide you with a prescription. Most prescriptions are written in horizontal rows. Usually you will find the prescription for the right eye (OD) on the first row and the prescription for the left eye (OS) on the second row. On these rows you will be able to see the values: SPH (Sphere), CYL (Cylinder), AXIS and PD.
SPH number specifies if you are nearsighted or farsighted. Typically SPH numbers are between -20.00 and 20.00 (-20.00<SPH<20.00). Negative SPH number on the Prescription is for nearsighted and Positive SPH number on the Prescription is for farsighted.
CYL and AXIS values are being used for astigmatism correction.
PD is the distance from the center of the one pupil to the center of the other pupil. You cannot order your prescription glasses without the PD value.
If your prescription has also ADD values then these values will be used for the reading power of Bifocal or Progressive Lenses.
- What is Pupillary Distance & How to measure it?
Pupillary Distance is always measured in millimeters and it is defined as the distance from the center of the one pupil to the center of the other pupil, of one’s eyes.
Do you have a millimeter ruler and a mirror at your house? Then you are more than capable to measure your PD all by yourself!
- Stand away from your mirror about 203 mm (or 8 inches distance).
- Hold a ruler against your brow.
- Close your right eye then align the ruler’s 0 mm with the center of your left pupil.
- Look straight then close your left eye and open your right eye.
- The mm line that lines up to the center of your right pupil is your PD.
And that’s about it.
You have now found the distance between the centers of your pupils which corresponds to the single pupillary distance.
- How do I order only the frame?
This is very easy on Opticsfit website. You can just select the frame you want, choose the color of the frame you are interested and just add it to the cart.
- What is the definition of the Lens Index Numbers?
Lens Index Numbers (1.50, 1.56, 1.59, 1.61, 1.67, 1.74) defines the degree of refraction. If prescription glasses have a higher Lens Index then you will have thinner lenses.
- What are the Photochromic Lenses?
Photochromic Lenses are special lenses that are able to get darker as soon as they will be exposed to sunlight.
- Are there multiple Types of Prescriptions Lenses?
Yes there are multiple Types of Prescription Lenses. Some of them are: Single Vision, Bifocal, Progressive, Trifocals and Photochromic.
- What is the Processing time and Delivery Time?
Processing time of all orders worldwide, is 2-3 working days. Delivery time depends mostly on the destination a package is shipped to. You may check our Shipping Information Page for more specifications.
- How we can use the Virtual Try-On Guide?
You may check the instructions through our Virtual Try-On Guide page.
