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
Optician invoices NHS BSA at around £25 to £33 depending on the home nation rate. You pay nothing if you are in an eligible category.
Private test
£20 to £35
Asda £20, Specsavers £25, Boots £29.95, Vision Express ~£30. Enhanced or specialist options £40 to £80.
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 | Add-on £10-£25 | Included |
| Digital retinal photography | Discretionary | Add-on £10-£20 | Included |
| Humphrey visual field | If indicated | Add-on £30-£80 | 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. The rate is set annually by the Department of Health and Social Care after negotiation with optometry representative bodies. As of April 2026, the sight test fee in England is around £25.83 for a domiciliary-equipped standard examination; comparable rates apply across the home nations.
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 additional private upgrades (OCT, retinal photography) as standard in 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. Some chains schedule NHS slots at 15 to 20 minutes and private at 25 to 30. If you have many questions, a complex history, or a young or anxious child being tested, the extra time can be useful.
- 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?
Some chains schedule shorter slots for NHS-funded tests (15 to 20 minutes) versus private (20 to 30 minutes). Independent opticians more commonly run the same length appointment regardless. The clinical content is the same; the time difference reflects whether the optometrist allows extra space for OCT, frame discussion, or contact lens consultation.
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?
The full 11-category NHS register.
OCT scan cost
What the upgrade costs at each chain.
Specsavers price guide
£25 standard, £35 with OCT.
Boots Opticians price guide
£29.95 standard, £54.95 enhanced.
What to expect at an eye test
Step-by-step walkthrough.
Eye test cost Scotland
Free for every resident, no NHS vs private split.