NHS vs Private5 min read

Why Premium Cataract Lenses Cost More: A Surgeon on Pricing and Moral Hazard

A consultant ophthalmologist on why premium cataract lenses carry a ~£2,000 private margin when the lens itself costs about £500, and what happens when the choice is offered at cost. Guest opinion.

Dr John Ellis, MBChB FRCOphth MPH PhD PGDip HE

Published 6 July 2026Updated 6 July 2026

Editor's note: This is a guest opinion piece by a practising consultant ophthalmologist, published in his own words. The views are the author's own. TreatCompare sells nothing, prices nothing, and has no commercial relationship with the author or his clinic — where he writes "we", he means his own practice, not this site.

10-second answer

Compare NHS vs private cataract surgery

The relationship between a surgeon and the patient is not an equal one. It is a fiduciary relationship — that is, it has an asymmetry of knowledge, and therefore of power. There are both legal and ethical reasons for the doctor to behave in ways constrained by a high moral imperative not to abuse that asymmetry. This, one would assume, is a given. The existence and activity of the GMC, and egregious abuses in countries where no such body exists, indicate that it is not. Such is human nature.

If this is true for all medicine in degrees, it is certainly true of all surgery to a very significant degree.

Payment for service and moral hazard

How does payment for service — private versus public sector — change that? In this context, surgery may be exposed to moral hazard in two ways. The first is when it is advocated for when the realistic probability of benefit is low, and 'no surgery' is not given equal weight as an option.

But the second form of abuse, and where it becomes nuanced, is when surgery comes with options. And the options come with prices. And the prices come with increasing profit margins.

Cataract surgery steps straight into the fray here. Should it be done? And if done, which implant should be chosen?

Monofocal and 'premium': the two choices

For simplicity's sake in explanation, there are two options. A monofocal implant, which has a fixed focal length, and a whole family of lenses all aggregated under the moniker 'premium.' This grand vocabulary is clearly a marketing land grab.

The industry aspiration is easy enough to appreciate. With age we lose accommodation — effortless focus from book to horizon — and we develop cataract. When solving the latter, why not solve the former?

The problem is you can't cheat physics. Which is not to say we don't try. So, unable to replicate lens movement in zoom focus, we play with light instead, and try to focus all light from near (divergent light) to far (parallel light) through the 3mm pupil. This — because you can't cheat physics — comes with compromises. The best claim of rival premium products is that they have less optical aberration than the rival product(s).

Where does the extra £2,000 go?

Such an implant may cost £500 where a monofocal costs £50. But perusal of the private practice sites (caveat emptor) shows that the price margin for this choice is typically £2,000. So where is the extra money being spent?

Does it take longer to place the lens? No — surgery time is not extended. Does it take longer to counsel the patient before surgery? No — because the counsel has to be given to all before the option is chosen. This invests time (and 'time is money') upstream of the decision. If the patient chooses the premium lens or the monofocal lens, in both cases they have been fully appraised of the possible choices.

The margin, then, is largely or entirely profit. And with profit comes incentive. And with incentive comes moral hazard to the provider.

Our experiment: the option at cost

We have therefore experimented with providing this option at the price of the marginal cost of the product alone — namely £500. This removes profit, incentive and hazard.

The standard to beat, in clarity terms, is monofocal with glasses over the top. How many patients in the target demographic — the mean age of cataract surgery in the UK is 76 — have as a life ambition being spectacle-free? This is not the same demographic as the refractive lens exchange patient group. Their aspirations differ. It would always be worth asking. And the person asking should have no financial investment in the answer.

We have found extended-depth-of-focus lenses are wanted in 1% of cases.

An invitation to test it

For a provider to counter that their private clinical experience differs radically — these premium lenses are not available in the public sector — they would have to run the same experiment with the same set of conditions before being sure we are wrong: namely, offer the lens(es) at cost price.

Anyone up for that?

See how private cataract surgery starting prices compare with the NHS route, and what lens choice does to the total.

Compare cataract surgery prices

Important context

TreatCompare uses public data, provider-published information, official datasets, structured research and analysis. Figures can change and may not be complete in real time. Use this page for research and comparison only, then verify directly with the relevant provider.

Source type: Named public and provider sources
Primary source: GMC – Good Medical Practice
Reporting period: 2026-07-06
Last updated: 2026-07-06
Figure type: Mixed sources
Use: Research and comparison only

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Surgery and imaging depth

Procedure searches where price depth should compound

Private surgery and diagnostic scan searches need provider price examples, body-area variants, NHS wait context and quote-inclusion checks.

Search target	Price signal	Depth angle	Next data point
Private MRI scan cost UK	Body-area MRI rows and provider-published scan prices	With contrast, multiple regions and reporting fee differences	Provider examples for Vista, Nuffield, Spire, Circle and local imaging centres
Private X-ray cost UK	Plain-film imaging from lower-cost outpatient routes	Body part, report fee and referral requirement	Walk-in X-ray routes and hospital-group add-ons
Gallbladder surgery cost UK	Package-price private hospital rows	Consultation, anaesthetic, hospital stay and aftercare inclusions	Provider-by-provider package examples and excess policy notes
Colonoscopy cost UK	Diagnostic endoscopy rows	Sedation, biopsy, polyp removal and histology extras	Hospital and endoscopy-centre add-on fee capture

The generated scrape evidence now covers surgery and diagnostic imaging observations.

Procedure pages can show private price depth beside NHS RTT context.

Imaging pages should be split by body area where provider pages publish that granularity.

Frequently asked questions

Why do premium cataract lenses cost more than monofocal lenses?

The lens itself is more expensive to make — a premium lens might cost a clinic around £500 versus roughly £50 for a monofocal. But the price difference charged to patients privately is often around £2,000. Surgery time is the same and the counselling has to be given to everyone before the choice is made, so much of that gap is margin rather than added cost.

What is the difference between a monofocal and a premium cataract lens?

A monofocal lens has a single fixed focal length, so you typically wear glasses for either near or distance vision. 'Premium' is an umbrella term for lenses — such as multifocal and extended-depth-of-focus designs — that try to spread focus across more distances. Because you cannot cheat physics, that broader focus comes with optical trade-offs such as glare or reduced contrast.

Are premium cataract lenses worth it?

It depends entirely on the individual's goals. The mean age of cataract surgery in the UK is around 76, and being spectacle-free is not a life ambition for most people in that group — it is more often the aim of younger refractive lens exchange patients. The honest question is whether being free of glasses matters enough to you to accept the optical compromises, and it should be asked by someone with no financial stake in the answer.

How many patients actually choose an extended-depth-of-focus lens?

In the author's clinical experience, when the premium option is offered at the cost price of the lens alone — removing the profit incentive — extended-depth-of-focus lenses are wanted in about 1% of cases.

About the author

Dr John EllisMBChB FRCOphth MPH PhD PGDip HE

Consultant Ophthalmologist · Guest contributor

Dr John Ellis is a consultant ophthalmologist and a partner and co-founder of Accord Eye Care Ltd in Dundee. He writes here in a personal capacity. The views are his own. TreatCompare commissioned no payment for this piece and has no commercial relationship with the author or his clinic.

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Sources & further reading

GMC – Good Medical Practice — Professional duties governing the doctor–patient relationship, including honesty and acting in the patient's interest.
NHS – Cataract surgery — Public information on cataract surgery and lens options.