Help and Support

Understanding your prescription

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OD – oculus dexter means Right Eye

OS – oculus sinister means Left Eye

SPH (sphere)
This indicates the amount of lens power, measured in diopters (D), prescribed to correct short-sightedness or long-sightedness. A “+” in the box indicates that you are long sighted and a “-” in the box indicates you are short sighted. It is generally measured in 0.25 steps.


CYL (cylinder)
This indicates the level of astigmatism of your eyes. It occurs when the cornea or lens isn’t a perfectly curved shape (like a football) and is rugby ball shaped. If this column is left blank, it means you have no astigmatism. This is also generally measured in 0.25 steps.

The axis is the direction of the astigmatism and is defined with a number from 1 to 180. If there is a value in the cyl column, it also must include an axis value, which follows the cyl power.

This usually indicates that your eyes do not work well as a pair. If there is muscle imbalance between your eyes, prism lenses will provide the correction you need and help prevent double vision or headaches.

A prism is prescribed to compensate for eye alignment problems which means your eyes do not work well as a pair. It is uncommon to have a prism in a prescription. However if you do, prism lenses will correct the muscle imbalance between your eyes and can help prevent headaches or double vision.

Four abbreviations are used for prism direction: BU = base up; BD = base down; BI = base in (toward the wearer’s nose); BO = base out (toward the wearer’s ear).

The add indicates the amount of added magnifying power required for you to read at close distances. This means you have separate prescriptions for distance and reading. Generally, it will range from +0.75 to +3.00 D and will be the same power for both eyes.



Step to buying spectacles online

  1. Up-to-date eye test

Generally you should get your eyes tested every 2 years unless stated otherwise on your prescription. If your prescription is outdated, visit your local optical shop to get a new one.

When you get your eyesight examined, the optometrist must give you a copy of the prescription whether or not you ask for it.

2. Measure Your Pupillary Distance

Pupillary Distance (PD) is the distance between your pupils – usually measured in millimeters.


3. Matching spectacles frames to face shapes

There are three main factors you should consider before choosing your specs for your face shape:

  1. Spectacles should reiterate your personal best feature (such as a green frame to match green eyes).
  2. The frame shape should contrast with your face shape.
  3. The frame size should be in scale with your face size.



Although most faces are a combination of shapes and angles, below are the most common face shapes and recommended spectacles to go with them!


An oval face is considered to be the ideal shape because of its balanced proportions. To keep the oval’s natural balance, look for eyeglass frames that are as wide as (or wider than) the broadest part of the face, or walnut-shaped frames that are not too deep or too narrow.



A long face is longer than it is wide and has a long straight cheek line and sometimes a longish nose. To make an oblong face appear shorter and more balanced, try frames that have more depth than width, decorative or contrasting temples that add width to the face, or a lowbridge to shorten the nose.




A square face has a strong jaw line and a broad forehead, plus the width and length are in the same proportions. To make a square face look longer and to soften the angles, try narrow frame styles, frames that have more width than depth, and narrow ovals.



Diamond-shaped faces are narrow at the eye line and jawline, and have broad cheekbones that may be high and dramatic. This is the rarest face shape. To highlight the eyes and soften the cheekbones, try frames that have detailing or distinctive brow lines, or try rimless frames or oval and cat-eye shapes




A round face has curved lines with the width and length in the same proportions and no angles. To make a round face appear thinner and longer, try angular narrow eyeglass frames to lengthen the face, a clear bridge that widens the eyes, and frames that are wider than they are deep, such as a rectangular shape.




Understanding the frame sizes


All frame measurements are given in millimetres and can usually be found on the inside of the arm or on the inside of the bridge.

The width of our face shapes vary from person to person. The frame width is the best indicator of whether a frame will be too wide on your face or too short.

frame size



An example of a frame with the following numbers. “53 – 16– 135”
In this example this means that the lens diameter is 53mm the bridge is 16mm and the arm length/side length is 135mm.




Delivery information


Prices: £3.95 uk , £7.95 EU and £13.95 rest of the world. UK delivery after the item has been shipped may take up to 5 working days.