Buying Glasses for Less: Should You Take Your Prescription Somewhere Else?

You've had your eyes tested, been handed your new prescription and then started looking at frames, only to discover that the glasses you fancy could cost considerably more than you expected.

But here's something worth remembering: you don't have to buy your spectacles from the optician who tested your eyes.

In the UK, following your sight test, your optometrist must provide your prescription, and you're free to take it elsewhere. The NHS specifically advises you shouldn't feel obliged to buy your glasses from the practice that performed your eye examination.

That opens up several possibilities, including independent spectacle dispensers and online glasses retailers.

Shopping around could save money

Glasses can become expensive remarkably quickly.

Start with a frame, add prescription lenses, perhaps choose thinner lenses, anti-reflective coatings, photochromic lenses or varifocals, and the final bill can be very different from the price displayed beside the frame.

Taking your prescription elsewhere allows you to compare the complete price, rather than assuming your optometrist's practice is your only option.

An independent dispensing optician may offer frames and lenses at competitive prices while still providing face-to-face measurements, fitting and subsequent adjustments. Registered dispensing opticians are regulated healthcare professionals trained to advise on and fit spectacles according to an individual's visual and lifestyle requirements.

What about buying glasses online?

Online spectacle companies can be extremely tempting, particularly for straightforward single-vision prescriptions.

Advantages can include lower prices, huge frame selections, easy price comparisons and the convenience of ordering without leaving home.

For someone who knows the size and style of frame they like and has a relatively uncomplicated prescription, online glasses can potentially provide an inexpensive second pair, reading glasses or prescription sunglasses.

There is, however, a significant catch.

Your prescription isn't necessarily every measurement required to make your glasses properly.

For example, your pupillary distance, the measurement used to help position the lenses correctly in relation to your eyes, isn't legally required to appear on the prescription provided following your eye examination. Responsibility for properly centring the lenses rests with whoever supplies the spectacles.

Some online companies therefore ask customers to take measurements themselves.

When professional fitting becomes more important

The stronger or more complicated your prescription, the more cautious you should be about choosing glasses purely on price.

The Association of Optometrists particularly highlights high prescriptions, varifocals and substantial differences between the two eyes as situations where accurate measurements are important.

Varifocals are a good example. The positioning of the different viewing areas within the lenses needs to correspond properly with your eyes and the way the frame sits on your face.

There's evidence for exercising caution online. Research cited by the College of Optometrists found spectacles bought online were more likely to fail optical tolerance testing than those supplied through high-street practices. Participants nevertheless identified lower prices, convenience and clearer pricing among the attractions of buying online.

Don't forget the importance of fit

There's another difference that has nothing to do with your prescription.

A pair of glasses needs to fit your face.

Frames that constantly slide down your nose, pinch behind your ears or sit crookedly can become thoroughly irritating.

A good dispensing optician can adjust the sides, nose pads and general position of the frame and check how the spectacles sit once the finished lenses have been fitted.

That's harder to reproduce when your glasses arrive through the post.

Don't confuse buying glasses with having your eyes tested

Perhaps the most important point is that saving money on spectacles shouldn't mean skipping regular eye examinations.

An eye examination isn't merely a means of obtaining a prescription. It's also an opportunity for an optometrist to examine your eye health and identify changes which may need further investigation.

So by all means shop around after you've been properly examined.

The That's Health verdict

There's no single answer suitable for everybody.

For a straightforward prescription, an established online supplier could offer substantial convenience and savings. An independent spectacle fitter may provide an attractive middle ground: competitive prices combined with professional measuring, fitting and aftercare.

For high prescriptions, varifocals, unusual requirements or situations where accurate positioning is particularly important, the advantages of face-to-face professional dispensing become much greater.

And remember to compare like with like. Ask what lenses are included, what coatings you're getting, whether thinning is included, what happens if the glasses aren't right and whether adjustments and aftercare are provided.

Your eyesight is too important to choose glasses solely because they're cheap – but that doesn't mean you have to pay more than necessary.

That’s Health note: This article is intended as general information rather than individual optical or medical advice. Continue to have your eyes examined at the intervals recommended by your optometrist and seek professional advice if you experience changes in your vision.

One particularly useful point for readers receiving help with optical costs is that NHS optical vouchers can be taken to a supplier of their choice provided that supplier accepts them. 

https://www.nhs.uk/nhs-services/opticians/nhs-voucher-values-for-glasses-and-lenses