Short answer: Refractive lens exchange (RLE) replaces the natural lens inside your eye with an artificial lens, to correct your prescription and reduce your need for glasses, including reading glasses. It is the same operation as cataract surgery, done before a cataract forms. It mostly suits people in their 50s and beyond who need reading glasses, and people with high long-sightedness. The lens you choose (monofocal, extended depth of focus or multifocal) decides how much you can see without glasses at each distance, and how likely you are to notice halos at night.
This guide explains who RLE suits, the lens options, results, risks and recovery. For prices, and why Medicare and health funds don’t pay, see Refractive lens exchange cost. For the procedure at Focus Vision, see our refractive lens exchange page.
What is refractive lens exchange?
Inside your eye, behind the iris, is a natural lens. When you are young it changes shape to focus up close. From your 40s it gradually stiffens, so you need reading glasses (presbyopia), and later in life it clouds into a cataract.
In RLE, the surgeon removes this lens through a tiny incision and replaces it with an artificial intraocular lens (IOL) whose power is chosen to correct your prescription. Because the natural lens is removed, a cataract can’t form in that eye. RLE is sometimes called clear lens exchange, clear lens extraction or lens replacement surgery.
Who suits RLE, and who doesn’t
RLE often suits people who:
- need reading glasses because of presbyopia, usually from their 50s;
- are long-sighted, particularly with a high prescription;
- have early lens changes that don’t yet count as a cataract;
- aren’t good candidates for corneal laser surgery, for example because of their prescription or corneas (AAO EyeWiki).
RLE is usually not the first choice if you:
- are younger and your eyes can still focus up close. Removing a lens that still works means losing that ability, so laser eye surgery or an implantable contact lens is usually better (AAO EyeWiki);
- are very short-sighted and not yet presbyopic, because the risk of retinal detachment after lens surgery is higher in short-sighted eyes (Chan & Varma, 2024);
- have other eye conditions, such as macular disease, uncontrolled diabetic eye disease or glaucoma, or inflammation, which your surgeon will check for (AAO EyeWiki).
As a general guide from our surgeons: under 50, laser eye surgery is usually the better option; over 60, refractive lens exchange usually is; between 50 and 60 it is decided case by case. For some long-sighted people, lens surgery can be better than laser from the late 30s. See Which eye surgery is best for me? for a side-by-side comparison.
Lens types: monofocal, EDOF and multifocal
The lens decides your range of clear vision. The American Academy of Ophthalmology describes the main types (AAO):
| Lens type | How it works | Vision without glasses | Main trade-off |
|---|---|---|---|
| Monofocal | One focusing distance | Clear at one distance, usually far | Reading glasses needed for near (unless set up as monovision) |
| Extended depth of focus (EDOF) | One corrective zone that “extends” the range of focus | Distance and intermediate (computer, dashboard), some near | Glasses may be needed for fine print or dim light |
| Multifocal (trifocal) | Several zones set at different powers, focusing far, intermediate and near at once | Distance, intermediate and near | More halos and glare at night, slightly reduced contrast |
| Toric (any of the above) | Also corrects astigmatism | As above | Needs precise alignment in the eye |
What the evidence says
- Multifocal versus monofocal. A Cochrane review of 20 trials found similar distance vision, better near vision and more freedom from glasses with multifocal lenses, but more glare and halos and reduced contrast sensitivity. The authors concluded that “motivation to achieve spectacle independence is likely to be the deciding factor” (de Silva et al., 2016).
- EDOF versus trifocal. A 2023 meta-analysis of 22 studies (2,200 eyes) found trifocal lenses gave better uncorrected near vision and more freedom from glasses, with no significant difference in distance or intermediate vision, or in reported halos and glare (Karam et al., 2023). An earlier review found EDOF lenses gave better contrast sensitivity but weaker near vision (Liu et al., 2019).
In practice: if being free of glasses for reading matters most to you, a multifocal (trifocal) lens is more likely to achieve it. If you drive a lot at night or would be bothered by halos, an EDOF lens, accepting glasses for fine print, may suit you better.
Lenses we use
Focus Vision offers EDOF, multifocal and toric lenses, and our surgeons recommend one after discussing how you use your eyes. Examples:
- Rayner RayOne Galaxy: a non-diffractive lens with a spiral optic, designed to give a continuous range of vision (Rayner). See the Rayner Galaxy spiral IOL.
- TECNIS PureSee: a purely refractive EDOF lens; compared with a monofocal lens, it gives better intermediate vision with comparable distance vision (Johnson & Johnson). Our surgeons contributed to research on this lens: see how we helped develop the PureSee lens.
Monovision (blended vision) is another approach: monofocal or EDOF lenses with one eye set for distance and the other for nearer work. If you haven’t tried it, it can be trialled first with contact lenses. We don’t currently offer the light adjustable lens; see why.
Results
With a multifocal or EDOF lens, many people can do most everyday tasks without glasses, and multifocal lenses give the most freedom from glasses for reading (de Silva et al., 2016; Karam et al., 2023). Results depend on the lens, your eyes and your expectations. Two things are worth knowing:
- There is a period of adjustment. With multifocal and EDOF lenses, many people find their vision keeps improving over the first weeks to months as they get used to the new optics.
- Fine-tuning is sometimes needed. If a small prescription remains once your eyes are stable, laser fine-tuning is free for two years under our enhancement policy.
Our surgeons audit their lens surgery outcomes against published benchmarks using the Refractive Outcomes Analyzer, a free tool they built for cataract and lens surgeons.
Risks
RLE is intraocular surgery, and your surgeon will go through the risks with you:
- Infection inside the eye (endophthalmitis): rare. A meta-analysis of nearly 5.9 million cataract operations found a rate of 0.063% in studies since 2010, about 6 in 10,000 eyes (Shi et al., 2022).
- Retinal detachment: uncommon after RLE, but more common than after cataract surgery, and more likely in short-sighted eyes (Passaro et al., 2025; Chan & Varma, 2024). Know the warning signs (new floaters, flashes, or a shadow in your vision) and seek help urgently if they occur.
- Halos, glare and reduced contrast, especially with multifocal lenses (de Silva et al., 2016).
- Clouding behind the lens (posterior capsule opacification): the thin capsule holding the lens can cloud months or years later. It is treated with a quick laser procedure that is usually painless (YAG capsulotomy). In a UK study of 20,763 eyes, 5.8% to 19.3% needed this laser within five years, depending on the lens model (PMC7182577).
- A remaining prescription, which can usually be fine-tuned with laser.
Surgery and recovery
- RLE is day surgery under local anaesthetic with sedation, and each eye takes a short time.
- Both eyes on the same day: both eyes can usually be treated in one visit as two separate procedures, giving one recovery period and less time off work. The evidence on same-day surgery, mostly from cataract surgery, is set out in our RLE cost guide.
- Vision is often clearer within a day or two, and keeps settling over the following weeks. You’ll have follow-up visits, with a year of follow-up appointments included in the price.
Cost
At Focus Vision, refractive lens exchange is from $6,000 per eye, including your premium lens, the hospital and anaesthetist fees, assessments and a year of follow-up; prescribed medications and eye drops are extra (costs page). Medicare and private health funds don’t pay for RLE done to correct your prescription. See Refractive lens exchange cost for the details.
To find out whether RLE suits your eyes, and which lens would suit your lifestyle, book a free optometrist assessment or call (07) 3239 5005.
References
- American Academy of Ophthalmology. Clear Lens Extraction. EyeWiki. eyewiki.aao.org/Clear_Lens_Extraction
- Chan and Varma. Refractive lens exchange – the evidence behind the practise. Eye. 2025;39. nature.com/articles/s41433-024-03478-3
- American Academy of Ophthalmology. IOL implants. EyeSmart. aao.org/eye-health/treatments/iol-implants
- de Silva SR, Evans JR, Kirthi V, Ziaei M, Leyland M. Multifocal versus monofocal intraocular lenses after cataract extraction. Cochrane Database Syst Rev. 2016;12:CD003169. pubmed.ncbi.nlm.nih.gov/27943250
- Karam M, Alkhowaiter N, Alkhabbaz A, et al. Extended depth of focus versus trifocal for intraocular lens implantation: an updated systematic review and meta-analysis. Am J Ophthalmol. 2023;251:52-70. pubmed.ncbi.nlm.nih.gov/36736751
- Liu et al. BMC Ophthalmol. 2019 (meta-analysis of extended depth of focus versus multifocal intraocular lenses). pmc.ncbi.nlm.nih.gov/articles/PMC6719364
- Rayner. Rayner announces full release of RayOne Galaxy spiral IOL (product information). rayner.com/global/galaxy-full-release-news
- Johnson & Johnson Vision. TECNIS PureSee IOL (product information). jnjvisionpro.com/en-us/products/tecnis-puresee
- Shi SL, Yu XN, Cui YL, Zheng SF, Shentu XC. Incidence of endophthalmitis after phacoemulsification cataract surgery: a meta-analysis. Int J Ophthalmol. 2022;15(2):327-335. doi:10.18240/ijo.2022.02.20. doi.org/10.18240/ijo.2022.02.20
- Passaro ML, Kilic D, Virgili G, et al. Retinal detachment incidence in refractive lens exchange versus cataract surgery: uncommon versus rare – systematic review and meta-analysis. Br J Ophthalmol. 2025;109:756-764. bjo.bmj.com/content/109/7/756
- UK multicentre study of Nd:YAG capsulotomy rates after monofocal IOL implantation (20,763 eyes). PubMed Central PMC7182577. pmc.ncbi.nlm.nih.gov/articles/PMC7182577