Refractive Lens Exchange (RLE): Lens Replacement Eye Surgery Explained
Quick answer: Refractive lens exchange (RLE) is lens replacement surgery: the eye's clear natural lens is removed and replaced with an intraocular lens (IOL) to correct the prescription, using the same technique as cataract surgery. It is mainly considered for people over about 45 with long sight or presbyopia who want less dependence on glasses. Because it is intraocular surgery, risks include infection, retinal detachment (higher in very short-sighted eyes) and later clouding of the lens capsule.
Considering eye surgery? Start with an eye examination at Vision Concern for an assessment and referral advice.
How RLE works
Through a small incision, the surgeon uses ultrasound (phacoemulsification) to remove the natural lens and inserts a folded IOL. Accurate measurements of eye length and corneal curvature (ocular biometry) are used to choose the lens power.
Lens options
- Monofocal: clear at one distance; glasses usually still needed for reading or distance.
- Toric: also corrects astigmatism.
- Multifocal or trifocal: aims for distance, middle and near vision, with possible glare or haloes at night.
- Extended depth of focus (EDOF): smoother range from distance to middle, often with mild reading glasses for small print.
RLE vs LASIK and ICL
Laser surgery reshapes the cornea and does not stop age-related loss of near focus. ICL adds a lens and keeps your natural lens, which suits younger adults. RLE replaces the natural lens, so a cataract cannot develop later, and it suits older eyes that are losing focus anyway.
Risks and recovery
Many people see well within days, using drops for several weeks. Possible issues include infection, inflammation, swelling at the back of the eye, retinal detachment, glare or haloes with multifocal lenses, and posterior capsule opacification, which is treated with a quick laser procedure.
How Vision Concern can help
Vision Concern is an eye-examination clinic and optical shop in Kathmandu with branches in Lazimpat, Boudha-Tushal and Makalbari. It does not perform surgery or injections. Its optometrists can examine your eyes, explain your prescription and findings, and advise on referral to an eye hospital or specialist; it can also provide glasses and contact lenses before or after treatment elsewhere.
Frequently asked questions
Is RLE the same as cataract surgery?
The operation is the same; the difference is that in RLE the natural lens is still clear and is replaced to correct the prescription.
Can a cataract come back after RLE?
No, because the natural lens has been removed, though the capsule behind the new lens can cloud later and is treated with laser.
Who should not have RLE?
Younger people with active focusing, and some eyes with high myopia or retinal risk factors, may be better served by other options. A surgeon decides after examination.
This guide is general education and does not replace an eye examination or advice from your treating doctor.
Yes. Many visitors, particularly from Bangladesh and West Bengal (Kolkata), come to Nepal for cataract, retina, or other eye surgery at a hospital and also want new glasses, a general eye exam, or contact lenses at the same time, before or after their procedure. Vision Concern is an optical and eye-examination clinic, not a surgical hospital, so we work alongside hospitals such as Tilganga: we are happy to see you for glasses, contact lenses, or a routine check-up either side of your surgical treatment elsewhere.
No conversion is needed. Eyeglass prescriptions from Germany, France, the UK, the USA, China, Russia, and almost every other country use the same international format, SPH (sphere), CYL (cylinder), and AXIS, measured in diopters. Our opticians read this directly, so you can bring your prescription paper, a photo of it on your phone, or simply your current glasses, and we will use the same values. If your prescription is more than a year or two old, we recommend a quick, free re-check before we make your new pair.
Yes. Above roughly 3,000 metres, UV exposure increases sharply because of the thinner atmosphere and reflection off snow, and ordinary sunglasses (category 2-3) do not block enough UV to prevent snow blindness (photokeratitis). We recommend glacier glasses or category-4 sunglasses with side shields, and can fit these with your own prescription if needed. Vision Concern offers ZEISS polarized, UV400-certified sunglasses with prescription lenses, which we can prepare before you set off on your trek.