Give the Nutrition Question
a Number to Work With.
Patients already ask about their nutrition and what to take for their eyes, and a consultation rarely has room for the full answer. Prysm iO is a 15-second fingertip scan that reads skin carotenoid levels - the same family of pigments found in leafy greens and colourful vegetables - and turns them into one score that can be re-checked at a later visit. It sits alongside your clinical work, never in place of it, and any income it earns you is the kind you declare openly.
- A wellness reading, not a test: it makes no claim to assess or predict eye disease
- Small enough for a consulting-room desk or a clinic reception, paired with an app on a phone or tablet
- Built for open use - you decide whether, where and with whom, and you declare it
No sales script and no obligation on the call - just enough to decide whether it earns a place in how you work.
The Nutrition Conversation Deserves More Than Whatever Time Is Left Over
By the time the assessment is finished, the imaging reviewed and the plan explained, there is rarely room to talk about nutrition properly - yet it is the thing patients ask about on the way out. Patient guidance from bodies such as the Macular Society already points towards leafy greens, omega-3s, not smoking and regular exercise. Prysm iO does not add another test to your clinic. It gives that short conversation a reference point: a number the patient can watch, and that you can ask about next time.
76%
Of NHS ophthalmology units said in the Royal College of Ophthalmologists 2022 workforce census that they lacked enough consultants for current demand
700,000
People in the UK living with age-related macular degeneration, the biggest single cause of sight loss, according to the Macular Society
15 sec
The length of a Prysm iO fingertip scan - short enough to sit alongside a consultation without booking anything extra
Is Their Diet Actually Supporting Their Eye Health?
Patients rarely connect their diet with their eye health unless it is pointed out to them. Lutein-rich food loses potency between the shelf and the plate, so a patient who thinks they eat well can still be short of the specific nutrients that matter most here.
A supplement, taken on faith
Plenty of patients already take a lutein or eye-health supplement on faith - a bottle, a routine, a hope it's doing something - with no way to know if it is actually reaching the eye. That is exactly the kind of question a consulting room is built to answer.
A reading, not an assumption
A 15-second scan gives a patient their own carotenoid score, a genuine personal reading rather than a generic recommendation, and a natural addition to an eye-health conversation you are already having.
Guaranteed, not just marketed
The Pharmanex Certified range is built to raise a score that has room to climb, and that claim comes with a guarantee rather than just marketing: no improvement within 90-100 days on a certified, Prysm-eligible product means a full refund, subject to Nu Skin's Terms and Conditions.
Make the eye-health nutrition conversation measurable, and back it with a range built to move the number.
The Ingredients Patients Already Ask You About
When someone with a lower score wants to raise it, the products we suggest are built around carotenoids and other nutrients that come up in everyday eye-health conversations. Pharmanex formulas are designed to be highly bioavailable. Here is what the range includes, described plainly and without promising anything about anyone's eyes.
Lutein
A carotenoid found in leafy greens and other colourful plants, and the one patients ask about most. Lutein is included in products in the range in a highly bioavailable form, alongside other carotenoids.
Zeaxanthin and other carotenoids
The multivitamin formulas also provide a wider carotenoid blend, and JVi, the fruit-and-vegetable beverage, contains carotenoids too. These are the same family of pigments the Prysm iO scan reads in the skin.
DHA omega-3
Marine Omega supplies EPA and DHA. DHA contributes to the maintenance of normal vision, as part of a varied diet.
Vitamins and minerals
The LifePak formulas provide a broad set of vitamins and minerals formulated to support normal vision, among other everyday functions.
Substantiated Before It Reaches the Shelf
Every Pharmanex formula goes through Pharmanex's 6S Quality Process: selection, sourcing, structure, standardisation, safety and substantiation. The last of those means product claims rest on documented preclinical and clinical studies. And the most persuasive evidence of all is the person's own: they scan, take the products, and watch their own score move.
Let the Score Do the Comparing
You can scan someone who is currently taking any other product to set a baseline. If they choose to move to a Prysm-certified alternative, you re-scan them over the following weeks and they watch their score move. Because the scan reads carotenoids in skin tissue, a rising score is an objective sign that what they are taking is being absorbed and reaching the body, rather than something taken on trust.
100 Million Healthy Households
Many patients will want a Prysm iO device of their own, so that they can keep re-scanning at home and scan family members too, even competing a little for the highest score. Nu Skin's stated aim is 100 million healthy households, each with a device and a shared habit of better choices on nutrition and supplements. If you offer patients a device, declare your commercial interest to them, as you would with anything else here.
A supplement someone takes because a clinician has advised it for a diagnosed condition should only ever be changed with that clinician's agreement. The score is a wellness reading, not a reason to stop or switch clinically advised treatment.
Food supplements are not a substitute for a varied and balanced diet, which should always come first. These products are not medicines and are not intended to diagnose, treat, cure or prevent any eye condition, and they do not replace ophthalmic assessment or treatment. Please check each product's label for its exact ingredients and amounts.
Four Questions a Careful Doctor Asks First
You are registered with the GMC, you answer to a trust or a hospital, and your patients trust what you tell them. So the sensible questions come before the enthusiasm. Here are the ones that come up most, answered plainly.
"Isn't earning from this a conflict of interest?"
It is the right question to ask first. GMC guidance expects doctors to be open about any financial interest that could affect how they advise, treat or refer patients, and to put patients' interests ahead of their own. In practice that means declaring it, never letting it shape a clinical decision, and never pressing a product on anyone. Some doctors will decide to use Prysm iO only away from patient care. That is a legitimate choice, and it is yours. Take your own advice from the GMC, your employer and your indemnifier.
"Does it tell me anything about the macula or the retina?"
No. Prysm iO reads carotenoid levels in the skin of a fingertip. It does not measure macular pigment, does not assess the retina, and makes no claim to diagnose or predict any eye condition. Nothing about it replaces ophthalmic assessment. It is a wellness reading about nutrition and lifestyle patterns, and it should be described to patients in exactly those terms.
"My lists are already overrunning."
Understood. The scan takes 15 seconds and pairs with an app on a phone or tablet, so there is nothing separate to book. You will need to install the app and spend a little time learning it. Whether it is discussed in a follow-up, handled by a member of your team, or kept for settings outside patient care is up to you.
"I work across NHS and private settings."
Many ophthalmologists do. Anything you do with Prysm iO in your own private rooms is separate from your NHS contract, but trusts and private hospitals can each have their own rules on outside interests and on selling to patients. Read them before you start, and ask if they are unclear.
How a Light Reading Becomes a Score
Prysm iO uses optical scanning to turn nutritional wellness into a personalised score in around 15 seconds - no blood draw, no lab appointment, and nothing demanding for a patient to sit through.
What comes out is one trackable result. It is not an ophthalmic measurement and it says nothing about the eye itself, but it is easy to explain and easy to return to, which is what a brief nutrition and lifestyle discussion needs.
Each reading is taken from a fingertip on the same hand, which keeps results consistent from one scan to the next. That consistency is what makes a trend worth trusting, rather than a single number that shifts with how the device was held. The device pairs with the Prysm iO app on an iOS or Android phone or tablet. You will need to install the app and spend a little time getting to know it, but once you have, the device sits as comfortably on a consulting-room desk as anywhere else.
Prysm iO is a wellness insight tool. It is not intended to diagnose, treat, cure, prevent, or mitigate any disease or medical condition, and it is not a substitute for ophthalmic assessment, diagnosis or treatment, or for medical or dietetic advice.
Over in 15 Seconds
Brief enough to fit around a consultation or a follow-up without a separate appointment, and simple enough to run from a desk or a reception counter. No blood draw, no lab, no waiting on results.
Spectral Rai Technology
A single fingertip placement captures tens of thousands of individual light measurements through hyperspectral absorption, reading carotenoid-related activity in the skin.
One Score, Not a Data Dump
An AI model distils those readings into a single Prysm Score between 100 and 1000 - something a patient can grasp in a sentence, rather than a report that needs interpreting.
Something to Come Back To
Patients follow their score in a connected app between visits, which keeps whatever lifestyle advice you have given in front of them and offers a natural point to revisit at a re-check.
Backed by Real Research
Over 20 years of Pharmanex (a division of Nu Skin) R&D sits behind it - 110 clinical studies, 180 white papers, and 18 global patents. This is health-tech with a paper trail, not a wellness gadget.
Good Advice Sticks Better
When There Is Something to Measure.
Patients rarely lack the intention to improve their nutrition. What they lack is feedback. Prysm iO gives them a single figure between 100 and 1000 that they can follow in the companion app between visits, and that you can revisit at the next one. It is a prompt for a healthier routine, not a measure of their eye health.
Advice With Something to Watch
Lifestyle advice is easy to agree with and hard to keep up. A skin carotenoid score tends to reflect nutrition and supplement use over time, so a patient who changes their nutrition can look for the number to follow, rather than taking it on trust that it is working.
A Natural Reason to Re-Check
A repeat scan fits neatly alongside a routine follow-up visit. It gives both of you something concrete to look back at, without turning the appointment into a sales conversation.
A Neutral Thing to Talk About
Talking about a wellness number is a gentler route into nutrition and lifestyle than talking about a diagnosis. The score belongs to the patient, and the conversation stays on habits rather than on their eyes.
Worth stating clearly: a rising score is not evidence that anyone's eyes have improved, and a low one is not a finding about their eyes either. Patients should hear that from you, in those words.
Six Ways Eye Doctors Could Use This
Ophthalmology is not one working pattern. Some of you are NHS-only, some independent, most a mix of the two. See whether any of these describes how your week is really arranged.
Private-Practice Consultants
Your own rooms or regular lists at an independent hospital, where consultations have room to breathe and patients expect advice that reaches beyond the eye.
Medical Retina and AMD Specialists
Few areas of ophthalmology field the "what should I be doing about my nutrition?" question as often. A neutral wellness figure gives that discussion a starting point without saying anything about anyone's retina.
Cataract and Refractive Surgeons
Patients weighing up surgery are often health-minded already. A scan can suit a clinic open evening or a pre-assessment waiting area, provided it is presented as a wellness extra.
NHS Consultants With Sessional Private Work
An NHS contract on one side and a private list on the other. Use Prysm iO only where your employer's rules allow it, and only where you are content to declare it.
Practice Owners and Clinic Directors
If you run a practice, a scanner at reception can be handled entirely by your team, so none of your consulting time is touched and any commercial arrangement is set out clearly from day one.
Ophthalmologists Who Teach and Speak
If you already give patient-education talks or lecture on lifestyle and eye health, a scan gives an audience something to try, entirely away from patient care.
Sound like you?
That's usually enough of a signal. Book a short demo and we will work out honestly whether it belongs in what you do.
Income That Continues, and the Ground Rules That Come With It.
When someone chooses to subscribe to a product after their scan, you earn commission on each recurring shipment for as long as they stay subscribed - it does not depend on you being in the room again. Because you are a doctor, that income has to be earned the right way. It is stronger when the interest is declared, the person is free to say no, and the score is described honestly as a wellness figure. Handled like that, it can sit comfortably beside your clinical work rather than in tension with it.
Open by Default
If you discuss Prysm iO with a patient, tell them you earn from it. GMC guidance on financial interests asks exactly that of doctors, and it makes for a more honest conversation than one where the interest is left unsaid.
Their Choice, Not Your Prescription
These are wellness supplements, not treatments. Nobody should be steered towards them because of what they might pay you, and never in place of clinical advice or care.
We Run the Subscriptions
Payments, shipping and delivery queries for subscribers are handled by us rather than by you, so you are never chasing a renewal or answering a "where is my order" message. Your part is limited to seeing commission credited after each recurring shipment.
Check Your Own Rules First
NHS trusts and private hospitals can have their own policies on outside work and commercial interests. Read yours, and speak to your indemnifier, before you begin. We cannot give regulatory advice, and would much rather you asked.
What Might This Add Alongside Clinical Work?
Enter figures that reflect how you would realistically run this, and see how scan fees, retail profit and commissions could build as subscribers accumulate. It is an illustration for you to test your own assumptions against, not a forecast.
Everything shown is built from scans you carry out and the subscriptions that people then choose to take up. The 5-year figure assumes 10 scans a week, every week, without a break, and most people will not keep that up for five years. The real limit is finding enough people to scan in a setting where doing so is appropriate. Any income of this kind should be openly declared, and how you use Prysm iO with patients is for you to settle with GMC guidance and your employer's rules before you rely on any of these figures.
Your Numbers
Recommended minimum: £10
Typical Subscription Take-Up
These starting percentages reflect what we typically see when someone with a lower score chooses a product from the range below - adjust them up or down if the people you scan behave differently. Nobody should be pushed towards a purchase.
After 6 Months
260 total people scanned
40% converted to subscribers
One-Off (Scans) / Year
£5,200
Recurring (Subs) / Year
£47,548
Total Annual Income
£52,748
After 12 Months
520 total people scanned
40% converted to subscribers
One-Off (Scans) / Year
£5,200
Recurring (Subs) / Year
£104,736
Total Annual Income
£109,936
After 3 Years
1,560 total people scanned
40% converted to subscribers
One-Off (Scans) / Year
£5,200
Recurring (Subs) / Year
£316,175
Total Annual Income
£321,375
After 5 Years
2,600 total people scanned
40% converted to subscribers
One-Off (Scans) / Year
£5,200
Recurring (Subs) / Year
£530,671
Total Annual Income
£535,871
Illustrative only, based on the figures you enter and assumes subscriptions once taken up continue without cancellation. Actual earnings depend on individual effort, subscriber retention, and market conditions, and are not guaranteed. Registered doctors are responsible for declaring financial interests and for following GMC guidance and their employer's policies.
“A doctor is right to ask what a score is actually built on before mentioning it to anyone.”
The honest answer has three parts. Skin carotenoids have been studied for years as a biomarker of fruit and vegetable intake. Pharmanex has spent two decades developing the scanning behind this device. And Prysm iO itself has been recognised with Technology Innovation honours at the TITAN Business Awards, a Wellness Insight win at the Globee Business Awards and a Good Design Award. None of that makes it a clinical instrument, and it is not presented as one - but it is a reasonable answer for a colleague or patient who asks what is behind it.
Yale Researchers Tested the Underlying Science
The underlying skin-carotenoid science was independently evaluated by researchers at Yale School of Public Health, whose 2013 paper called it “an attractive biomarker for use in human studies” that is “highly reproducible and valid.”
4.3 years younger
Average biological age difference, top vs bottom Prysm-scoring group, in an early Stanford Medicine pilot study across all 11 body systems tracked
Early-stage pilot data (n=33); full results are expected to be published by the end of 2026. Not a claim that Prysm iO diagnoses, treats, or reverses ageing.
Read the full research20+ yrs
Of Pharmanex R&D behind the science, from the original BioPhotonic Scanner to Prysm iO
110
Published clinical studies underpinning the underlying technology
18
Global patents covering the scanning method itself
25M+
Scans already completed worldwide on earlier-generation devices
2025
Achievement in Technology Innovation (TITAN Business Awards), Wellness Insight (Globee Business Awards), and a Personal-category win at the Good Design Awards
A Way In to Eye-Health Conversations Where Nobody Is Your Patient
Ophthalmologists give talks, teach, sit on panels and join patient-education evenings. At any of them, a scanner on the table gives an audience something hands-on, and it does so without the questions that come with recommending anything to someone in your care.
The Device Draws Questions
A small lit scanner on a table at a talk, a health fair or a team wellbeing day gets people asking what it does before you have said anything about it.
The Result Explains Itself
Someone leaves with a real number and a short note on what it reflects. That is a far easier introduction to nutrition than a leaflet, and it keeps the discussion on general wellbeing.
Follow-Up by Invitation Only
If someone wants to hear more, they can leave their details with their consent. There is no cold outreach, and nobody is added to anything they did not ask to join.
Have a talk or event in the diary?
Tell us about it and we will say honestly whether Prysm iO belongs there.
Two Steps. That's It.
A device from £333 does not call for a long sales process, so we do not run one. Book a demo, ask your questions, and decide in your own time.
Already Sold? Just Order It
If you have already worked out where it fits and the price makes sense, skip straight to checkout - it's handled securely right here on this page.
Still Deciding? Book a 30-Minute Demo Call
Pick a time that suits your rota - no need to fill in a form first and wait for us to come back to you.
You Decide
We show you the device and the evidence behind it, then talk through how other professionals handle the declaring-your-interest side - no script, and no pressure to commit on the call.
Pick Your Starting Point
Go all in with the complete wellness bundle, or start lighter with the Mini Starter-Kit. Checkout is secure and handled right here on this page.
Backed by Nu Skin's Prysm Score money-back guarantee - if a person's score hasn't improved after 90-100 days on a certified Prysm-eligible product, it's refundable, subject to Nu Skin's Terms & Conditions.
Complete Wellness Bundle
The device plus a full Pharmanex nutrition stack, so you can run scans and, where it is appropriate, talk through the range in the same sitting.
- 1x Prysm iO Device (with 1x LifePak Elements)£333
- 1x Professional Stand & Case£66
- £38
- £220
- £182
- £129
The device also includes a calibration disc, microfiber cleaning cloth, and USB-C charging cable. A second LifePak Elements below brings the total to 2.
Secure checkout powered by Stripe
Prysm iO Mini Starter-Kit
Just the scanner, with a calibration disc, microfiber cleaning cloth, USB-C cable, and one LifePak Elements (90 tablets) to get you started. No stand, case, or wider bundle.
£333
Questions Doctors Ask Before Anything Else
Straight answers to what comes up on almost every first call, including the awkward ones.
Ready to Find Out More?
Fill in the form and we'll get back to you within 1-2 business days - or, just click to book a call at a time that works for you. The first chat is simply about understanding how you work and answering whatever questions you have - nothing more.
We take your privacy seriously. What you submit here is used only to review your enquiry and get in touch about Prysm iO - never sold, never used for unrelated marketing, and deletable on request at any time.