Frequently Asked Questions

One Stop Glasses should be one of the quickest ways of getting a pair of glasses ordered online and delivered to your door.

We put our best efforts into making sure we have all the frames we display in stock. Where we are caught out we can usually get replacement stock next day from our wholesalers.

We carry many lenses in stock and manufacture and glaze lenses on-site.

Your order is posted Royal Mail First Class, and where the contents make possible will be posted in a packet that will fit through a letterbox. Our packets are tracked to the point of delivery but you do not need to be at home to sign for them.

Typical lead times are as follows,

Standard Single Vision - Allow 1-4 working days

Single Vision High Index, Photochromics etc. - 2-5 working days

Varifocals - 5-10 working days

Rimless orders - add 1-3 working days

Many factors can affect how long it will take to make and despatch your glasses, if your order is time sensitive feel free to let us know.

 What are Varifocal lenses, or progressive lenses?

As their name suggests, varifocal lenses allow you to see at varying distances, the power increases progressively down the lens.

This is necessary as the eye gradually loses the ability to focus on near objects as we age, and needs some help.

The drawback to this is that it is only the top part of the lens that is suited to distance vision, so wearers can have problems when walking around because the floor isn't as clear, and because of the varying power of the lens there is swim and sway effect when moving.

This happens to a varying degree depending on the quality of the lens, we have 3 options, which we consider all to be good lenses,

* A Standard Freeform lens, this is a traditional front surface progressive design with an aspheric freeform back surface, the aspheric surface has digital enhancements to minimise the problems noted above. A well performing lens at a budget conscious price.

** An Atoric Dual Surface Freeform lens, the progressive surface is worked on the front and the back of the lens, this makes for wider areas of clear vision and increased reduction of swim, sway and other aberrations. This should be considered a premium lens and in our opinion gives the best 'bang for your buck'.

Both of the above are supplied with a Hard Hydrophobic Anti Reflection coating.

*** HOYA Balansis, in our opinion the best lens on the market before going down the 'tailor made' route (which is something that cannot be offered online anyway).

It is a highly technological lens and will present the minimum of problems encountered with varifocal lenses. The Balansis is supplied with Hoya's High Vision Long LIfe coating,  again we believe this to be the best available and it comes with a 2 year no quibble guarantee where misuse isn't an obvious factor.

If you are in any doubt, please feel free to email us an image of your prescription and we will check it against your order.
When entering your prescription please include all the details (we can ignore any we don't need),
And include +/- signs and any decimal places.
(On a handwritten or Specsavers prescription, the +/- sign may be above the number)

After an eye examination you will be provided with a copy of the results of the sight test element, your spectacle prescription. You shouldn't have to ask for it, it is a legal requirement.

Prescriptions can take a handful of different formats, but they all contain the same details.

There are 2 main differences,

First, whether Right and Left are side by side, or one above the other. 

Secondly, whether you have a Reading/Near prescription, or an Add.

The GOS 2 form style, possibly the most common and as such the way we lay out our prescription entry form, as shown below,

The same prescription if written with an add, rather than the full details for near, would look as follows,


These details are directly transferable to our online form, as per below.


The same prescription might look like this...

Same details, but the details for the Right Eye written above the Left.

Some correct examples of prescriptions can be seen below,

So, Points to note:

  • Sphere/Sph values can be plus or minus (but will usually be both plus OR minus)
  • Plano and the infinity sign mean Zero
  • DS written in Cyl means Sph only (and can be omitted)
  • Cylinder/Cyl values can be plus or minus (and will always be both plus OR minus)
  • There can be just a Sph value, without Cyl and Axis
  • Where there is Cyl, there is always an Axis, and vice versa.

Example of incorrect entry can be seen below... Avoid these errors or if necessary check the details with your optometrist and we won't need to delay your order by querying the details.

2 problems with this one, there's a mix of plus and minus Cyl,
And there is only a reading prescription, which may well be correct but if we had all the details we would know for sure.

And 2 more problems with this one, no +/- signs, no decimal places. It is customary to assume a value is plus unless otherwise noted, but our enquiries prove that this is not a safe assumption.

This one is missing a value each for Right and Left, there will either be just a Sph value, or all 3 Sph, Cyl and Axis.


The absolute simplest way of doing this is to buy the glasses and select Frame Only - No Lenses under Glasses type. We will then send you just the frame.

Any unwanted frames returned to us will be refunded immediately on receipt, any you wish to keep we will merely arrange to charge for any lens add-ons.

Much is being made of the potential harm of blue light on our eyes as more of us spend longer in front of digital screens, the following is our understanding  of the situation.

Light at the blue end of the spectrum is essential for well being, cognitive function and sleep and wake cycles.
However some wavelengths of blue light, in particular those emitted by digital devices, can be to our detriment.


Do you remember being asked whether the red or green target is clearest during an eye exam?

This is because different colours of light focus at different distances and this simple test can help an optometrist fine tune your prescription so that your eyes can relax while looking at the normal things around us.

With blue light being at the end of the visible spectrum, and focusing in front of the retina, when viewing digital screens the eye needs to constantly refocus causing potential fatigue.

So the benefits of our Blue Block coating?

  • Screens out Blue Light allowing only beneficial light to pass through the lens.
  • Reduces eye strain and fatigue.
  • Enhanced contrast and clarity
  • Reduced glare.
  • All our Blue Block lenses are also Easy Clean, Hydrophobic and offer UV protection.

Pupil Distance

You may have obtained your PD or Pupil Distance from your optician or optometrist or it may be noted on your prescription. If not you will need it measuring.

Your Pupil Distance measurement will normally be between between 60 and 65mm though it is not unheard of for a pupil distance to fall within 55 to 70mm.

Measuring your Pupil Distance

Is measuring Pupil Distance difficult to do?
The measurement needed is that between the pupils when the eyes are gazing into the distance. If the eyes are looking at something close (including the person carrying out the measurement) the pupils will be slightly closer together.

We recommend the following method:

  • Recruit a willing assistant.
  • Face each other, stood or sitting so both parties are at a similar height.
  • The subject being measured should look beyond the measurer, maybe over their shoulder, at a distant object, or one at least a few metres away.
  • Depending on the eye colour, the easiest way to measure pupil distance will be to measure at the opposite edges of the pupil, or the iris as shown, with a millimetre rule placed against the forehead.
  • Measure a few times to make sure you are seeing consistent results.

Send us a pair of your specs

If you aren't confident you have the correct measurement you can send a pair of specs to us, and we can take the pupil distance from those, assuming they have been made accurately which if you find them comfortable to wear should be the case.

Use an image for scale

  • Have your phone ready to take a picture.
  • Put a credit card or similar against your forehead.
  • Take a 'selfie' with the phone at arms length and with your gaze beyond the phone and into the distance.
  • Repeat until you have a good result with your face & gaze straight and the card horizontal.


  • Open the image in any software that will allow crop and scale/resize.
  • Crop out a portion containing just the width of the card and your eyes.

  • Credit cards are 85.6mm so resize this image to 85.6mm or 856 pixels.
  • Crop again to get your pupils (centre to centre or edge to edge, as shown).

  • The new image size will be your pupil distance (divide by 10 if using pixels).

Feel free to send an image to us and we will calculate the pupil distance measurement for you.

Does it matter?

You will read on the net that an average is fine, or it hardly matters etc, so what is the truth regarding the pupil distance, or PD?

Well it depends on the strength of the prescription, a small prescription with the PD slightly off will be no problem at all for most, but a large prescription a considerable way off will cause a certain degree of strain to the muscles which control the direction of gaze.

The eyes default to looking straight ahead, turning requires effort.

Put simply, if the lenses are not centred correctly then the image in front of your pupil is not heading in straight, so to speak, so the eye needs to turn slightly to align it.

You can not damage your eyes with incorrectly centred lenses, but fatigue may be experienced with headaches and possibly double vision in extreme cases. In short the larger the prescription, the more accurate the PD needs to be for comfortable vision.

Varifocal lenses require an accurate PD, they have a channel of clear vision as you move from distance to near and it is important that this is correctly placed.

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