NHS vs private eye test
The two are not really different products. Same optometrists, same equipment, identical core clinical examination. The difference is who pays and what optional extras are bundled in. Here is the breakdown side by side.
NHS-funded test
Free if eligible
The optician invoices the NHS at the fee its nation sets: £24.13 in England, £25.52 in Northern Ireland, £46.53 to £56.60 in Scotland. You pay nothing if you are in an eligible category.
Private test
£24 to £30
Asda £24, Specsavers £25, Boots from £29.95, Vision Express £30. With an OCT scan: Vision Express £30 (included), Specsavers £25 plus up to £10, Boots from £54.95.
What is included in each
| Element | NHS-funded | Standard private | Enhanced private |
|---|---|---|---|
| Visual acuity (Snellen) | Included | Included | Included |
| Refraction (prescription) | Included | Included | Included |
| Intraocular pressure (tonometry) | Included | Included | Included |
| Slit lamp examination | Included | Included | Included |
| Fundus / retinal examination | Included | Included | Included |
| Visual field confrontation test | Included | Included | Included |
| OCT scan | Discretionary | Specsavers up to £10, Boots from £25 | Included |
| Digital retinal photography | Discretionary | No chain publishes a price | Included |
| Humphrey visual field | If indicated | Set by the practice | Usually included |
| Longer appointment slot | Not included | Sometimes | Included |
| Dry eye assessment | Not included | Add-on | Sometimes included |
| Prescription copy at end | Included | Included | Included |
How NHS reimbursement actually works
When you have an NHS-funded sight test, the optician you visit invoices the relevant NHS body (NHS BSA in England, NHS Scotland, NHS Wales, or HSC BSO in Northern Ireland) at the General Ophthalmic Services contract rate. Each nation sets its own fee, and they are not comparable. For 2025/26 the England GOS1 sight test fee is £24.13, a 2.5 per cent uplift backdated to 1 April 2025. Northern Ireland pays £25.52 for a GOS sight test. Scotland, which funds a test for every resident rather than only for qualifying groups, pays far more per examination: £46.53 for a patient under 60, £50.31 at 60 or over, and £56.60 at 60 or over with a digital retinal photo. Wales sets its own WGOS 1 eye examination fee under the contract it relaunched in 2025.
Fees read 29 September 2026. England: DHSC 2025/26 GOS1 determination. Scotland: PCA(O)2025(05) Annex A. Northern Ireland: HSC BSO.
That fee is what the optician receives. It is fixed regardless of which chain or independent the patient chose. Some chains have argued the rate is below the cost of delivering the examination, which is part of why some chains have moved towards bundling private upgrades such as the OCT scan into their private tests at modest extra cost.
For the patient, none of this billing complexity matters. You walk in, have the same examination as a private patient, walk out with the same prescription. The NHS pays the optician in the background.
When paying privately makes sense even if you qualify NHS
- You want a specialist not on the NHS list. Independent practices with niche equipment (paediatric optometry, low vision specialists, behavioural optometry) may not contract for NHS GOS or may have limited NHS appointment availability.
- You want OCT scanning as part of the test. NHS funding does not include OCT as a routine element. If you specifically want a 3D retinal cross-section as part of your annual exam, a private appointment that bundles OCT may be more convenient than an NHS test plus a separate £10-£25 add-on.
- You want a longer appointment. If you have many questions, a complex history, or a young or anxious child being tested, ask the practice how long the slot is when you book. No chain publishes separate NHS and private appointment lengths.
- You need an earlier appointment than NHS funding allows. The NHS only funds tests at recommended intervals (every two years for most adults; annual for certain categories). If something has changed (sudden vision problem, glasses broken, new symptoms) and your NHS interval has not yet elapsed, a private test gives you immediate access.
For most NHS-eligible patients, the NHS-funded test is the right choice. The clinical examination is identical to private, the optometrists are the same, and the eligibility is intended to be used.
Common questions
Is the NHS eye test the same as a private one?
The core clinical examination is identical: visual acuity, refraction, intraocular pressure, slit lamp examination, and ophthalmoscopy. The NHS reimburses the optician at a set rate for the standard test. Private adds may include OCT scanning, digital retinal photography, longer appointment time, and additional discussion of lens options.
Why would anyone pay for a private test if the NHS one is free?
Two reasons. First, only certain people are eligible for the NHS-funded test in England (age, condition, or benefit categories). If you do not qualify, your only options are private pay or moving to Scotland or Northern Ireland. Second, if you want OCT scanning or digital retinal photography as standard, only certain chains include these in the NHS examination at the optometrist's discretion.
Is the prescription from an NHS test the same as private?
Yes. The refraction process and the resulting prescription are identical. The optometrist must give you a copy of the prescription at the end of the test by law, regardless of NHS or private funding. You can take it to any optician or online retailer to dispense.
Does an NHS test take less time?
No chain publishes separate appointment lengths for NHS-funded and private tests. Of the big four, Vision Express publishes its eye test as "usually lasts 25 minutes", Asda as "usually about 30 minutes" and Boots "up to 1 hour 30 minutes in total" for the whole visit including choosing glasses; Specsavers gives no figure on its eye test page. The clinical sight test is the same whoever pays, so ask the practice how long your slot is if time matters to you.
Can I have a private test if I qualify for an NHS one?
Yes. You can choose to pay privately even if you qualify for free NHS funding. Sometimes useful if you want a specific specialist (an independent with niche equipment, a behavioural optometry practice for children, or a low vision specialist). Most people in NHS-eligible categories use the NHS funding.
What does a private test add that the NHS one does not?
Typically: OCT scanning (3D retinal cross-section), digital retinal photography (a record of the back of your eye), longer appointment with more discussion time, dry eye assessment, and broader frame selection. The clinical depth of the core eye examination is unchanged.
Sources
Related guides
Am I eligible for a free eye test?
Interactive checker for every NHS category.
OCT scan cost
What the upgrade costs at each chain.
Specsavers price guide
£25 standard, OCT scan up to £10 extra.
Boots Opticians price guide
From £29.95 standard, from £54.95 with OCT.
What to expect at an eye test
Step-by-step walkthrough.
Eye test cost Scotland
Free for every resident, no NHS vs private split.