What is a smart lens?
Smart lenses — trifocal intraocular lenses — are premium implants with multiple focal points that provide clarity for distance, intermediate and near vision. They are widely used to improve visual quality after cataract surgery and offer a refractive solution when corneal laser surgery is not suitable.
The implanted lens replaces the natural lens and focuses light onto the retina. This enables patients to perform tasks like reading, computer work and driving at different distances with reduced need for glasses.
Why is a smart lens used?
Presbyopia is age-related loss of near focusing ability due to reduced lens elasticity. Trifocal lenses reduce blurred near vision, eye strain and related headaches. In cataract patients, replacing the lens during surgery can simultaneously correct refractive errors.
Cataract
The cloudy lens is removed and replaced with a trifocal lens, reducing both blur and dependence on glasses.
Presbyopia
In patients over 40 with declining near vision, intraocular lens exchange can provide lasting focus at multiple distances.
Not suitable for laser
For patients with thin corneas or very high prescriptions, refractive lens exchange is a safe alternative.
Who is a smart lens suitable for?
Candidate criteria
- Adults over 40 with cataract or symptomatic presbyopia
- Patients seeking reduced dependence on glasses or those whose corneas are unsuitable for laser correction
- Patients whose retinal conditions, diabetes or glaucoma are controlled may be suitable after specialist assessment
Preoperative assessment
Biometry, corneal topography and intraocular pressure measurements determine lens power. We discuss the patient's lifestyle and expectations in detail to choose the best option.
Decision process
In patients with high astigmatism, toric trifocal lenses may be preferred.
How is a smart lens implanted?
Refractive lens exchange (RLE) replaces the natural crystalline lens with a trifocal intraocular lens. The procedure is performed under local anaesthesia, typically takes 10–20 minutes per eye, and is performed as an outpatient procedure.
Measurements & Planning
Eye measurements, corneal topography and lens power are calculated using biometry devices.
Natural Lens Removal
Small incisions are made and the cloudy lens is fragmented with ultrasound and removed.
Lens implantation
A foldable trifocal lens is placed into the capsular bag inside the eye; sutures are not required.
Clear vision at three distances and rapid recovery
Which lens is suitable for you?
Trifocal, toric, or monofocal lens options are compared according to your lifestyle and ocular structure.
Freedom from glasses
Reduces the need for separate reading or distance glasses.
- Improved reading comfort
- More freedom for travel and sports
High technology
Advanced designs optimise light distribution and minimise contrast loss.
- Aspheric optics
- UV and blue light filters
Quality of Life
Reading, computer work and night driving are more comfortable in daily activities.
- Reduces eye fatigue
- Preserves color perception
Recovery after surgery
After the procedure most patients go home the same day. Follow‑up visits are scheduled in the first days. Initially, mild blurring, glare and light sensitivity are common and typically improve as the eye heals.
- Antibiotic and anti‑inflammatory eye drops are prescribed to prevent infection and control inflammation.
- Avoid rubbing the eyes; use a protective shield or glasses while sleeping as advised.
- Avoid water exposure and eye makeup during the first week.
- Do not miss follow‑up appointments to monitor intraocular pressure and lens position.
Most patients adapt within a few weeks and notice improved distance, intermediate and near vision without glasses.