Quick guide to understanding your prescription and applying it to your new eyeglasses.
You can order vision glasses with a prescription online much easier than you imagine!
What do all those letters and numbers mean?
The numbers on your eyeglass prescription reflect your visual needs, your refractive error, and how the eyeglass lenses should be cut.
Typically, you'll see the following abbreviations:
D.O., A.O., SPH, CYL, AX, DP, ADD, Prizm & Base etc. 
The most basic ones you will encounter:
D.O. = Right Eye
Α.Ο.= Left Eye
SPH= H Sphere or Sphere (SPH) indicates the power of your lens to correct nearsightedness or farsightedness. If in front of it there is a minus (-) then it means you have myopia. If there is a plus (+) in front of it, it means you have farsightedness.
CYL= O Cylinder or Cylinder (CYL) in conjunction with Axis (AXE) indicates the power of your lens to correct astigmatism. If this column is empty, it means you do not have astigmatism.
AXE= O Axis or Axis (AXE) indicates the angle of the lens, with which the Cylinder (CYL) placed to correct astigmatism.
DP= H Visual Distance (DP) is the distance between the two daughters. A must-have feature so your glasses manufacturer knows where to place the optical center on each lens so you can see with the greatest sharpness and clarity.
The rarest ones you will encounter:
ADD= The addition (ADD) is adding near vision or adding power to the bottom of multifocal eyeglasses. It can be used equally in medium distance (office) glasses, with a computer filter, etc. The addition (ADD) it is the same for both eyes and appears as a positive value, which usually ranges between +0.50 and +3.50.
Prizm/Base= The B means Base and there is base down (BD), base on (BI), base out (BO) and base up (BU).
Recipe types:
A myopic prescription displays a number with a minus sign (-) in the Sphere (SPH) box. Your lenses will be shaped to improve your distance vision.
Presbyopic Recipe:
A presbyopic prescription displays a number with a plus sign (+) in the Sphere (SPH) box. Your lenses will be shaped to improve your near vision.
Astigmatic Prescription:
A presbyopic prescription displays a number in the "Cylinder (CYL)" column of your prescription that indicates the power of the lens needed to correct the astigmatism. Additionally, there will be a number in the "Axis (AXE)" column that is also required for astigmatism correction.
Multifocal Recipe:
A multifocal prescription displays a number in the "ADD" column of your prescription,
How often should an eye exam be performed?
The eye examination should be performed approximately every 2 years.
Children should have their first eye exam when they are about six months old, and then another just before they start school. This ensures that they can see clearly in the classroom. Poor eyesight can seriously affect a child's learning.
How do I fill my prescription online?
1. Choose your prescription type:
2. Choose the type of lenses according to your everyday life and visual needs.
3. After choosing the Type of Lenses, choose their Quality. There are four (4) Qualities available, which are upgraded according to the features each one offers.
4. Then you select the Refractive Index, which is related to the thickness of the lens. According to your prescription numbers, the corresponding refractive indices are suggested so that your lenses are made as thin as possible. 
5. Finally, you are given the Extra Filter option. If you spend long hours in front of digital screens or your glasses are used outdoors in strong sunlight, you can choose a Blue Light filter or a Photochromic filter.
Read more:
Types of Lenses
Size
Details
Koriki
