Femto-LASIK
Proven. Precise. With the widest correction range.
Up to 45Short-sightedLong-sightedAstigmatism
Lens surgery · Vision correction
EDoF lenses in Germany
Far and screen. Fewer halos at night.
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Medical content prepared for review by Dr. med. Levent Kanal, head surgeonIn short
An EDoF lens (extended depth of focus) is an artificial lens that stretches one focal point into a continuous range — from far to screen distance — instead of splitting light into separate zones. It replaces the natural lens in a lens exchange or cataract surgery. The result: driving, TV and screen without glasses, with fewer halos at night than a multifocal lens. For small print, light reading glasses are sometimes still needed.
How it works — 3 steps
- 1We measure your eyes and talk about your day.Screen and driving matter more than small print? Then an EDoF lens is the candidate.
- 2The lens is calculated and implanted in a 15-minute operation.Same steps as cataract surgery: 2 mm opening, drops, no stitches. One eye per day.
- 3Far and screen are clear within days.Adaptation is short. Small print may need light reading glasses.
Range
Far · screen
One continuous focus range
Both eyes
Two consecutive days
One trip, about four days
Anaesthesia
Eye drops
No injection, no general anaesthesia
Glasses afterwards
For small print
Light reading glasses, sometimes
Halos at night
Fewer
Close to a monofocal lens
Suitable for
45 and older
Lens exchange or cataract surgery
SuitabilityIs an EDoF lens right for you?
A first orientation. The examination gives the final answer.
Good fit if …
- Driving, TV and screen matter most to you; small print less.
- You drive a lot at night and want as few halos as possible.
- 45 or older with reading glasses, or a cataract that needs surgery anyway.
- Healthy macula and retina. A slightly irregular cornea is less of a problem than with a multifocal lens.
- Astigmatism is corrected in the same (toric) lens.
Better alternatives if …
- You want to read small print without any glasses → multifocal lens
- You want the sharpest possible distance vision and do not mind reading glasses → monofocal lens
- Under 45 with a clear lens → SMILE® Pro, Femto-LASIK or an implantable lens (ICL)
- Macular disease or uncontrolled glaucoma → we treat that first, or discuss other options.
Not sure? Tell us about your eyes. The head surgeon gives you a first answer, usually within one working day.
CompareEDoF, multifocal or monofocal?
Three lens types, three trade-offs. Your eyes and your daily life decide.
Multifocal vs. EDoF lenses
Which lens for which life — in one minute.
| EDoF | Multifocal | Monofocal | |
|---|---|---|---|
| Distances | Far and screen | Near, screen and far | One distance |
| Reading glasses | For small print | Rarely | Yes, for near |
| Halos at night | Fewer | Possible at first | Very low |
| Contrast in dim light | Good | Slightly reduced | Best |
| Adaptation | Short | A few weeks | None |
| Astigmatism | Toric version | Toric version | Toric version |
| Both eyes | Two consecutive days | Two consecutive days | Two consecutive days |
| Typical choice | Driving, screen work | Reading, office, hobbies | Sharpest distance, simplest |
ProcedureExamination, two surgery days, final check.
One examination, one eye per day on two consecutive days, a final check. All at our surgical centres in Wiesbaden and Düsseldorf.
Visit 1 · about 90 minutes
Examination
- We measure the length of the eye and the cornea (biometry), scan the macula (OCT) and map the cornea.
- You tell us how you live and work: driving at night, screen hours, how much you read. That decides between EDoF and multifocal.
- Dr. Kanal explains the realistic result — and where light reading glasses may still be needed.
- Pupils are dilated; do not drive afterwards. No contact lenses for 1–2 weeks before.
Visits 2 and 3 · one eye each
Surgery days
- Come without make-up. Bring sunglasses and, if you can, a companion.
- Drops numb the eye; you may get a mild sedative. You see light and movement, no detail. No pain.
- Through a 2 mm opening the natural lens is dissolved by ultrasound and removed. The folded new lens unfolds in its place. About 15 minutes.
- A short rest, then you go home with a protective shield. The second eye follows the next day, after a check of the first.
Artificial lenses compared
Monofocal, multifocal or EDoF — Dr. Kanal explains.
Understanding cataract surgery: how the procedure works
The same steps as a lens exchange, explained.
The lens: extended depth of focus
- One elongated focal point instead of separate zones: far to screen distance without a gap.
- Light is not split, so contrast and night vision stay close to a monofocal lens.
- Toric versions correct astigmatism in the same lens.
Visit 4 · next morning
Final check
- The morning after the second eye we check pressure, the lens position and the vision of both eyes, and go through your drops. Most patients see well enough to come on their own.
- Then you travel home. Afterwards, routine eye check-ups near your home.
Dr. med. Levent Kanal · Head surgeon
“EDoF lenses are my answer for patients who drive at night and live at the screen. They give up a little near vision for clean, quiet vision after dark. The right question is not which lens is best, but which distances your day is made of.”
Cataract and corneal surgeon · trainer of eye surgeons · 25+ years
Every lens implantation is performed by the head surgeon himself.
RecoveryResults you can plan for.
The first days, and what you can realistically expect.
Back to everyday life
| Screen, reading, TV | next day; both eyes together from day 4 |
| Driving | after the final check |
| Shower, hair washing | next day, no water in the eyes for 1 week |
| Sport, gym | after 2 weeks |
| Eye make-up | after 2 weeks |
| Swimming, sauna | after 4 weeks |
What you do
- Use your drops as scheduled for about 4 weeks — they prevent infection and inflammation.
- Do not rub or press the eye for 2 weeks. Wear the shield at night in the first week.
- Give near vision a few weeks: reading distance settles as you use it.
- Red, painful eye, sudden blur or new floaters? Call us the same day.
What to expect
Distance vision clear the next day, screen distance within days. Final result after about 3 months. Halos at night are fewer than with a multifocal lens. The lens stays for life.
What it does not do
It does not replace reading glasses for small print in every situation: menus in dim light or tiny labels may still need light glasses. It does not give continuous focus like a young eye.
RisksThe complete list.
Complication rates are low in long-term studies. Low is not the same as none. Here is the complete list.
Multifocal lens: halos at night?
Dr. Kanal answers in one minute.
Small print may still need glasses
The extended range ends around screen distance. For tiny print in dim light, light reading glasses may be needed. We say this before the operation.
Mild halos at night
Fewer than with a multifocal lens, but not zero. They fade for most within weeks.
Adaptation
Short, but the brain still learns the new range over days to weeks.
After-cataract
In some patients the capsule behind the lens clouds months or years later. A short laser treatment (YAG) clears it in minutes, once.
Residual value
Rarely the target is not fully reached. Glasses for one distance, a laser touch-up or a lens exchange are possible.
Very rare complications
Infection, swelling of the macula or a retinal detachment are very rare. Our centres work to clinical hygiene standards, and your drops are part of that protection.
“Trust begins with openness. We go through every point on this list together, with your own measurements on the screen.”
Dr. med. Levent Kanal · Head surgeon
Lens surgery patient
Patient story
“I can see everything again — near, far, and the faces of my grandchildren. I should have done it years ago.”
CostsA written quote after the examination.
No price list on the website: the quote depends on your eyes and the method. This is what you can expect.
When you get the quote
After the examination, in writing, before you decide. No obligation.
What the quote lists
Examination, the lens and the treatment of both eyes, the drops for the first weeks and the checks in our clinics — item by item.
Insurance and invoice
A private medical service in Germany. You receive an itemised invoice (GOÄ) for your insurer. Ask your insurer beforehand what they reimburse.
How you pay
By bank transfer or card, in euros. Payment options for patients from abroad are explained with the quote.
Prices are not published online because they depend on the findings of your examination. We answer cost questions personally: ask us.
From further awayComing from another region or from abroad?
Two steps. First we check remotely whether an EDoF lens is right for you. Only then do you travel — once, for about four days.
1Before you travel
Remote assessmentA first answer before you travel.
You tell us about your eyes and your current values in a private conversation. Dr. Kanal says whether an EDoF lens is realistic for you. If the answer is no, you do not travel.
What we will ask you
- Your current glasses or lens values
- Your age and how long your values have been stable
- Contact lens type and any eye conditions
You get a personal answer from Dr. Kanal, usually within one working day.
Your planFour days. One trip.
- 1
Day 1 · Examination
About 90 minutes. Lens choice with Dr. Kanal.
- 2
Day 2 · First eye
About two hours in the clinic, 15 minutes of surgery.
- 3
Day 3 · Second eye
Check of the first eye, then the second operation.
- 4
Day 4 · Final check
In the morning. Then you travel home.
- +
At home
Routine eye check-ups near your home.
Coming from further away? The schedule can differ from this plan. Ask us before you book anything. Ask about your plan · WhatsApp
2Your visit
About 4 days with usExamination, one eye per day, and a final check.
Once the remote assessment is positive, we plan the four days around your arrival in Wiesbaden or Düsseldorf. All later checks take place near your home.
Which airport, and how do I reach the clinic?Languages
Consultation and all documents in German and English.
Insurance and invoice
A private medical service in Germany. Itemised invoice for your insurer. Written quote after the examination.
Aftercare at home
Written report for your eye doctor. We stay reachable by WhatsApp for questions after you return.
Live in Rhine-Main or the Rhineland? Then no travel planning is needed. Your follow-up checks can take place at any of our 12 locations. Find your nearest clinic
Why Dr. LookOne surgeon for every patient. Two surgical centres.
Dr. med. Levent Kanal operates on every patient himself, in Wiesbaden and Düsseldorf: thousands of operations in 25 years. He leads a large team and trains young surgeons.
25+ years
of surgical experience
Thousands
of operations, every one by the head surgeon
12 locations
one surgeon, two surgical centres
Large team
led personally; young surgeons trained here
Beyond the clinicTraining young surgeons. Giving back.
Teaching
Training the next generation of eye surgeons
Ophthalmology wetlab in Aschaffenburg · Dr. Kanal as instructor
Community
Social commitment
Neuss integration run · sport connects people
Dr. Look channelHear it from our patients.
Patient stories
Modern eye medicine for clear vision
Dr. Levent Kanal
Why Dr. Look
Artificial lenses compared — monofocal, multifocal or EDoF?Lens surgery
Is a multifocal lens right for everyone?Lens surgery
Crosslinking for keratoconus: effect & benefitsEye healthQuestions about an EDoF lens
What does EDoF mean?
Extended depth of focus: the lens stretches one focal point into a continuous range from far to screen distance, instead of splitting light into separate zones. That gives fewer halos than a multifocal lens.
Will I need reading glasses?
For driving, TV and screen usually not. For small print in dim light, light reading glasses are sometimes needed.
EDoF or multifocal — which is better?
Neither is better; they trade differently. EDoF gives far and screen with fewer halos. Multifocal adds small print, with more halos at night. Your daily life decides.
Can I drive at night?
Yes. Fewer halos than with a multifocal lens is the main reason night drivers choose EDoF. Mild halos in the first weeks fade.
Both eyes on the same day?
No. The second eye follows the next day, after a check of the first. Both are done in one trip of about four days.
Does it hurt?
No. Drops numb the eye and you may get a mild sedative. You see light and movement during the 15 minutes, no detail.
Can a cataract still develop?
No. The natural lens is gone. An after-cataract of the capsule can occur and is cleared with a short laser treatment if it does.
Who performs the treatment?
Dr. med. Levent Kanal, the head surgeon, performs every lens implantation himself. In Wiesbaden and Düsseldorf.
I live far away. How many days do I need?
About four days: examination, first eye, second eye, final check. We first assess remotely whether the treatment is realistic for you; then you travel once. Afterwards, routine eye check-ups near your home.
What does it cost?
You get a written quote after the examination, listing the lens type and everything included. In Germany this is a private service.
LocationsFind the clinic closest to you
Two surgical centres and ten clinics. Choose your region and get directions in one tap.
Your journey to usWhich airport, and how do I reach the clinic?
Choose your surgical centre. The map shows the airport, the other clinics and the way to us.
Other treatmentsWhich method suits your eyes?
Laser or lens: the examination shows which treatment fits. Here are the alternatives at a glance.
Presbyond®
Near and far vision. Without reading glasses.
From 45PresbyopiaAstigmatism
Multifocal lenses
Reading, screen and driving with one lens.
From 45PresbyopiaCataract
SMILE® Pro
Flapless. Minimally invasive. The next generation.
Up to 45Short-sightedAstigmatism
Refractive lens exchange
The natural lens is replaced. No cataract later in life.
From 45PresbyopiaCataract
Cataract
Outpatient, about 15 minutes per eye. Clear the next morning.
OutpatientMonofocalMultifocalEDoF
Scientific sources
What this page is based on
Scientific sources
What this page is based on
Peer-reviewed studies and medical societies only. No manufacturer or commercial sources.
- Peer-reviewed study
Extended depth-of-focus technology in intraocular lenses
Kohnen T, Suryakumar R · Journal of Cataract & Refractive Surgery 2020;46(2):298–304
- Peer-reviewed study
Efficacy and safety of extended depth of focus intraocular lenses in cataract surgery: a systematic review and meta-analysis
Liu J, Dong Y, Wang Y · BMC Ophthalmology 2019;19:198
- Peer-reviewed study
Multifocal intraocular lenses and extended depth of focus intraocular lenses
Breyer DRH, Kaymak H, Ax T, Kretz FTA, Auffarth GU, Hagen PR · Asia-Pacific Journal of Ophthalmology 2017;6(4):339–349
- Peer-reviewed study
Efficacy and safety of multifocal intraocular lenses following cataract and refractive lens exchange: metaanalysis
Rosen E, Alió JL, Dick HB, Dell S, Slade S · Journal of Cataract & Refractive Surgery 2016;42(2):310–328
- Medical society
Assessment and quality assurance of refractive surgical procedures
Kommission Refraktive Chirurgie (KRC) of the German Ophthalmological Society (DOG) and the Professional Association of Ophthalmologists (BVA)
- Patient information
IOL implants: lens replacement after cataracts
American Academy of Ophthalmology, EyeSmart patient information