RayOne EMV lens: benefits, limitations and how it works
RayOne EMV is an enhanced monofocal intraocular lens made by Rayner. It is designed to give clear distance vision with a broader range of focus than a conventional monofocal lens, particularly for intermediate tasks such as looking at a computer screen.
Reading glasses may still be needed. More near vision can be obtained by aiming one eye slightly short-sighted, a strategy called mini-monovision, but this introduces a trade-off between near vision and distance clarity in that eye. EMV does not have diffractive rings and does not guarantee freedom from haloes or glare.
What sort of vision is RayOne EMV designed to provide?
The main aim is distance vision with some extra flexibility at intermediate distances. Looking across a room, using a screen at roughly 60–70 cm and reading small print at about 40 cm are different focusing tasks. Being comfortable at one distance does not establish glasses-free vision at all three.
If both eyes are aimed for distance, close reading is more likely to need glasses. With mini-monovision, one eye remains the main distance eye while the other helps with closer tasks. The chosen targets, the accuracy of the result, print size and lighting all matter. The implant has a fixed shape; it does not restore the natural lens’s ability to change focus.
How does its optical design work?
EMV uses a shaped, non-diffractive front surface to introduce controlled positive spherical aberration. This means light passing through different parts of the optic is brought into focus at slightly different positions, extending the usable range rather than creating three separate focal points with diffractive rings.
The central optical region and blended outer region are designed to balance that extension against image quality. A wider range of focus can soften the sharpest focus; the eye’s corneal optics and pupil size also influence the result. The underlying mechanism differs from other extended-focus lenses such as Tecnis PureSee, so their study results are not interchangeable.
What is the lens made of?
RayOne EMV is a single-piece, foldable hydrophilic acrylic lens. Its Rayacryl material contains 26% water at equilibrium and incorporates an ultraviolet absorber. The clear central optic is held in position by two broad, closed-loop haptics, the supports that sit within the lens capsule.
Hydrophilic describes the material’s interaction with water. It does not mean the lens changes focus. An ultraviolet filter does not establish protection against macular degeneration.
Some ophthalmologists prefer hydrophobic acrylic implants partly because certain earlier hydrophilic lenses developed delayed clouding from calcium deposits, called calcification. This was documented in older Hydroview, SC60B-OUV and Aqua-Sense lenses. The deposits impaired vision and sometimes required surgery to replace the implant.
Calcification has also been reported after retinal or corneal surgery using air or gas. Possible future surgery can therefore influence the choice of lens material. These reports do not establish the complication rate for RayOne EMV. For a fuller comparison, read about hydrophobic versus hydrophilic acrylic lens implants.
What are its technical specifications?
The non-toric model is RAO200E; the astigmatism-correcting model is RAO210T. Dioptres (D) describe optical power. The cylinder figures below are measured at the implant plane, not at the front surface of the cornea.
These are the manufacturer’s international platform specifications; available powers should be confirmed with the Australian supplier.
| Feature | Specification |
|---|---|
| Manufacturer / models | Rayner; RAO200E / RAO210T (toric) |
| Optical category | Enhanced monofocal; controlled positive spherical aberration |
| Material / filter | Single-piece hydrophilic Rayacryl acrylic; 26% water; ultraviolet absorber |
| Optic / overall span | 6.0 mm / 12.5 mm |
| Haptics / edge | Closed-loop, 0° angulation; 360° square optic edge |
| Non-toric power | +10.0 to +30.0 D, in 0.5 D steps |
| Toric spherical equivalent | +10.0 to +25.0 D, in 0.5 D steps |
| Toric cylinder at IOL plane | +0.75 to +4.50 D, in 0.75 D steps |
| Delivery | Fully preloaded RayOne system; manufacturer specifies a 2.2 mm incision |
Is there a toric version for astigmatism?
Yes. RayOne EMV Toric is available in Australia. It combines EMV’s focus design with correction for regular corneal astigmatism, where the cornea has different focusing powers in different directions.
The toric lens must be aligned to the intended axis. Rotation or residual prescription can reduce its benefit. A toric implant does not correct every irregular cornea. The toric lens guide explains measurements, alignment and remaining astigmatism.
What are the main advantages?
- A broader distance-to-intermediate range. The optical design aims to make some everyday tasks less dependent on glasses than a conventional monofocal lens.
- A non-diffractive approach. It avoids diffractive rings, while retaining the possibility of glare, haloes and reduced contrast.
- Flexibility through mini-monovision. A modest difference between the eyes can add useful closer vision for people who tolerate that balance.
- An astigmatism-correcting option. The toric version allows regular corneal astigmatism to be addressed within the same lens family.
What are the main limitations and uncertainties?
- Near vision remains a compromise. Small print, dim lighting or prolonged reading may need glasses. Greater near-eye short-sightedness can reduce that eye’s distance clarity.
- Optical symptoms remain possible. Non-diffractive does not mean halo-free, and laboratory contrast results do not prove better night driving.
- The result depends on more than the lens. Dry eye, corneal irregularity, retinal or optic nerve disease and residual prescription can limit vision.
- Clinical evidence is still limited. The studies discussed below are small, short-term and mainly concern selected eyes receiving mini-monovision, rather than both eyes aimed for distance.
What have clinical studies found?
The available studies suggest useful vision across several distances with EMV mini-monovision, but they do not establish that everyone can stop wearing glasses or that EMV is superior to other choices.
A prospective study of 51 patients
A Spanish study published in 2025 followed 51 patients, with 102 non-toric EMV eyes, for three months. Targets were distance in the dominant eye and −1.00 D in the other. Mean binocular uncorrected acuities were 0.06, 0.25 and 0.30 logMAR at 4 m, 66 cm and 40 cm, respectively, in bright test conditions; lower logMAR values indicate sharper vision.
Patients generally reported satisfaction, but reading was not uniformly effortless. There was no comparison group, and the study did not directly measure haloes or stereoacuity. Rayner funded the study and editorial/data-analysis assistance; the authors declared no competing interests.
A small comparison with PanOptix
A 2024 Turkish retrospective study compared 12 EMV patients, with 24 eyes targeted for mini-monovision, against 12 PanOptix patients, with 24 eyes targeted for distance. Six-month binocular acuity differences were not statistically significant. The EMV group had better measured photopic contrast and fewer reported light symptoms, but more glasses use. One EMV patient needed a further corneal procedure because the near-eye short-sightedness was poorly tolerated.
The small, non-randomised groups and different targets prevent a firm claim of equivalence or superiority. The authors reported no financial support or conflicts of interest.
Laboratory evidence
A bench study published online in 2025 tested six EMV lenses against six Acunex Quantum lenses and modelled mini-monovision. It illustrates how lens power, pupil aperture and eye-to-eye offset influence optical performance. It involved no patients; simulated acuity is not a clinical outcome. Funding included Teleon, the comparator’s manufacturer, and the authors disclosed industry relationships.
Who might find RayOne EMV a good fit?
EMV may suit someone who prioritises distance and intermediate vision, accepts reading glasses when needed, and prefers to avoid diffractive optics. Mini-monovision adds a separate decision about how much near vision to pursue and how much difference between the eyes is comfortable.
The choice should account for the tear film, cornea, macula, optic nerve, previous eye surgery and capsular support. If corneal transplantation or retinal surgery involving air or gas is likely, the hydrophilic material deserves particular discussion. This is a material-class concern, rather than a measured EMV-specific risk. The broader lens-choice guide explains why the whole eye matters.
What are the alternatives?
A conventional monofocal lens gives a simpler distance-first option, usually with reading glasses. Other enhanced monofocal and extended depth of focus (EDOF) lenses use different designs; Clareon Vivity is one non-diffractive EDOF example. Their materials, useful ranges and evidence need individual comparison.
Trifocal lenses aim for more unaided near vision, with a different balance of contrast and unwanted light effects. Choosing between these categories depends on reading priorities, night-time visual demands and eye health, rather than the longest advertised range of focus.
What risks and follow-up should I understand?
The usual risks of cataract surgery still apply, including infection, inflammation, retinal complications and a result that differs from the intended prescription. Early healing blur differs from persistent optical symptoms; ongoing problems need a cause identified before treatment.
Clouding of the capsule behind an implant is different from clouding of the lens material. YAG capsulotomy treats suitable capsule clouding. If lens exchange is being considered, discuss that decision before YAG treatment because opening the capsule can complicate a later exchange.
What should I ask before choosing this lens?
- Which exact EMV model is proposed, and do I need the toric version?
- What prescription is planned for each eye, and what reading distance is that intended to help?
- How might mini-monovision affect distance clarity, night driving or depth judgement for me?
- Which tasks are still likely to need glasses?
- Do my cornea, retina or likely future operations favour a different material or optical design?
- What is the plan if the prescription or optical symptoms are disappointing?
Sources and further reading
- Rayner. RayOne EMV platform brochure (2024), device specifications and optical design.
- Rayner. Current RayOne EMV specifications.
- Llovet-Rausell A et al. Patient satisfaction and quality of vision after bilateral implantation of enhanced monofocal IOL and mini-monovision: a prospective study. Eye and Vision (2025).
- Can İ, Bayhan HA. Clinical Outcomes of Enhanced Monofocal (Mono-EDOF) Intraocular Lenses with the Mini-Monovision Technique versus Trifocal Intraocular Lenses: A Comparative Study. Turkish Journal of Ophthalmology (2024).
- Naujokaitis T et al. Refining mini-monovision with monofocal plus intraocular lenses. Graefe’s Archive for Clinical and Experimental Ophthalmology (online 2025; print 2026).
- Australian Government. Prescribed List effective 1 July 2026: KG034 and KG038.
- Therapeutic Goods Administration. ARTG 220612.
- US FDA. RayOne EMV specified-lot recall Z-1338-2022.
- Rayner. Lens-calculation constants notice, 6 December 2022 (Swissmedic-hosted).
- Rayner. Instructions-for-use field safety notice, 23 September 2026 (regulator-hosted).
- Hydrophilic IOL calcification after vitrectomy: explanted-lens investigation (2023). Material-class evidence.
- Izak AM et al. Calcification of modern foldable hydrogel intraocular lens designs. Eye (2003). Historical Hydroview, SC60B-OUV and Aqua-Sense explants.
- Marcovich AL et al. Opacification of hydrophilic intraocular lenses associated with vitrectomy and injection of intraocular gas. BMJ Open Ophthalmology (2018).