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LBV technology

The LBV (Laser Blended Vision) procedure, or simply LBV is an advanced form of the LASIK technique. 

In contrast to conventional monovision (i.e. the LASIK and PRK procedure), patients are once again able to focus on objects at near-distance, at far-distance and even at middle distances after treatment with LBV. 

LBV procedure
Who is it suitable for?
Preliminary examination
Treatment
Aftercare
FAQs

The LBV procedure 

The LBV procedure is a safe, pain-free procedure that allows simultaneous treatment of age-related far-sightedness and other accompanying refractive errors. 

The surgical LBV technique combines the principle of monovision – the dominant eye is corrected for far-distance and the non-dominant eye for near-distance – with a corneal profile correction, which allows a greater depth of field to be achieved, thereby optimising the 'middle-distance vision' (i.e. depth perception for middle distances). This 'blend zone' is calculated individually for each patient. 

Due to the combination of these two methods and the resulting superimposition of the two pieces of information, it is possible to create a new image that allows both the far-distance and the near-distance to be sharper. 

Who is it suitable for?

The LBV procedure is generally suitable for anyone over the age of 40 who suffers from age-related far-sightedness and can be carried out in relation to treatment of other refractive disorders such as far-sightedness, near-sightedness and astigmatism. 

In order for the LBV procedure to be considered for a patient, he/she must have a sufficiently thick cornea (at least 500 μm or 500 micrometres). However, the LBV method is not suitable for people who are unable to see clearly because they suffer from eye diseases such as macular degeneration or cataracts.

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Preliminary examination 

It is important that patients stop wearing soft contact lenses two weeks before and hard (dimensionally stable) contact lenses four weeks before a preliminary examination. Otherwise, the correct measurement of the required values cannot be guaranteed. 

First of all, the eyes are measured in detail. This is followed by a detailed ophthalmological examination. In this context, the doctor also informs the patient about the course of the procedure and about possible risks and side effects of the treatment. 

The following measurements are taken as part of the preliminary examination: 

  • Determining eye length 
  • Measurement of anterior chamber depth and pupil width 
  • Determination of refractive values of the eye 
  • Inspection of the anterior and posterior chamber of the eye 
  • Eye pressure control 

Laser surgery in Switzerland in our centres

Beau-Rivage | Lausanne

Chemin de Beau-Rivage 18
1006 Lausanne

+41 58 274 23 00

refractive@swissvisio.net

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Eaux-Vives | Geneva

Rue du Nant 4-6
1207 Geneva

+41 58 274 22 30

eauxvives@swissvisio.net

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La Providence | Neuchâtel

Faubourg de l`Hôpital 81
200 Neuenburg

+41 58 274 22 40

providence@swissvisio.net

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Valère | Sion

Avenue de la Gare 27
1950 Sion

+41 58 274 23 40

valere@swissvisio.net

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Zürich

Klausstrasse 10
8008 Zurich

+41 58 274 23 30

zuerich@swissvisio.net

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Treatment

In principle, the treatment of age-related far-sightedness with the LBV procedure proceeds in the same way as laser eye surgery using the Femto-LASIK technique. The only difference is in how the refractive error is corrected.

Laser eye surgery using an LBV procedure takes an average of 20 minutes and is performed on an outpatient basis and using anaesthetic eye drops. During the procedure,  the laser is positioned over the head and the attending ophthalmologist sits at the head. 

To prevent blinking of the eye during surgery, the eyelid is fixed with an eyelid retainer or drape. 

  1. Generation of the flaps/corneal lamellae (according to the procedure in the Femto-LASIK method); the femtosecond laser is used to generate small gas bubbles in the tissue with micrometer precision, separating the flap from the eye 
  2. By moving the flap to one side, the treatment surface is ready for the excimer laser (treatment with the excimer laser takes about two to three seconds per dioptre)  
  3. Laser eye-tracking to compensate for involuntary eye movements (it’s good to know: the laser cannot 'slip')  
  4. Replacing the corneal lamella (flap) into its original position; the flap acts like a plaster that reduces the risk of inflammation 
  5. Repetition of the process in the other eye 

Aftercare 

Immediately after LBV treatment, most patients' vision is a little blurred. As soon as the flap is firmly fixed again, which happens within the first day after surgery, patients can see clearly again. 

To protect the eyes, the patient is initially give a normal dressing and a transparent eye patch. The first evening after the procedure should be spent in dim light. Getting to bed early also helps the eyes to recover more quickly. 

The ophthalmologist draws up an eye drops schedule for administering the eye drops, which patients should adhere to in order to prevent possible inflammation. Check-ups at the eye clinic usually take place on the next day after the operation, a week, one month, three months later.

Make-up should not be applied and rubbing the eye should be avoided in the first few days after treatment. Sensitivity to light and dry eyes are not unusual in the first few weeks after laser eye surgery – sunglasses or eye drops prescribed by a doctor can help alleviate this problem. 

FAQs

What happens during the LASIK procedure?

The term 'LASIK' (Laser-Assisted In Situ Keratomileusis) refers to eye surgery performed with an excimer laser to correct optical refractive errors, which, in contrast to photorefractive keratectomy, is not performed on the surface of the cornea but exclusively in the inner part of the cornea.

What is the purpose of laser eye correction using LBV?

The purpose of LBV treatment is to enable patients to see both near- and far-objects without glasses or contact lenses.

How does the LBV procedure differ from the Femto-LASIK technique?

In an LBV procedure – as with a Femto-LASIK treatment – a 'flap' (corneal lamella) is formed before the actual laser eye treatment. The eyes are then corrected at different distances (near and far) using the excimer laser as part of the LBV technique. In contrast, the Femto-LASIK procedure always corrects the eyes at the same distance, i.e. either near- or far-distance. In the LBV method, the dominant eye is corrected to almost 0 dioptres and the non-dominant eye is under-corrected to minus 1.5 dioptres.

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