Laser Eye Surgery

Mr Barsam had laser eye surgery himself, so has personal experience of the patient’s perspective, offering many vision correction solutions for every need.

What Is Laser Eye Surgery?

Laser eye surgery is a term used to describe a collection of procedures which commonly correct myopia (short sightedness) along with hypermetropia (long sightedness), astigmatism and presbyopia (reading vision problems). Different techniques are utilised to correct each condition. These corrections are achieved through the use of a laser which reshapes the cornea (the transparent part) and adjusts the focus of the eye. Laser eye surgery is a brief procedure and is entirely painless due to the application of anaesthetic drops.

Types of Laser Eye Surgery

The most common and popular type of laser eye surgery is LASIK. Alternatively LASEK/PRK treatment is also available to those with conditions unsuitable for LASIK treatment. Our team ensures that all our patients receive tailored, personalised care and the treatment this is recommended will be the one that best suits their visual needs.

Our Results

Laser eye surgery has been widely practised for the last 30 years, and there have been huge advancements in technology and techniques during this time. Allon Barsam and his team have a history of achieving excellent laser eye surgery results with 100% of our common prescription patients seeing 20/20 or better following treatment.


Mr Barsam carries out all laser bladeless LASIK eye surgery. The procedure is not painful as anaesthetic drops are used to completely numb the surface of the eye. Although you may take some time preparing for laser eye surgery, both eyes are done at the same time and the whole procedure typically takes around 10-15 minutes from start to finish.

First a femtosecond laser will create an ultra-thin flap in the cornea. Mr Barsam then gently reflects the flap so that the second laser, the excimer laser, can reshape the cornea in keeping with the required prescription.

Using a state of the art pupil tracking device means that if the eye moves during surgery, the laser will follow the eye or automatically stop if necessary. Mr Barsam then carefully repositions the flap before moving onto the other eye.

The Zeimer LDV

Allon Barsam only uses the world’s fastest and most technologically advanced laser combination for wavefront guided vision correction – ‘Z-LASIK.’ During LASIK surgery, Allon uses the Swiss made Zeimer LDV Crystalline Femtosecond Laser for flap creation and then the German made Wavelight Allegretto Excimer Laser.

Both of these lasers are the fastest commercially available FDA approved lasers for LASIK and the most tissue conserving. For example, the Wavelight Excimer Laser will remove 50% less tissue than most other lasers currently in use. This technology, combined with Mr Barsam’s expertise and experience, generates fantastic results in laser vision correction.


Mr Barsam now offers ReLEx SMILE, which is a key hole procedure similar to the LASIK laser eye surgery. ReLEx® SMILE is a new laser vision technique by ZEISS for the correction of vision defects.


Allon Barsam was initially trained and experienced with a less advanced laser combination, where by using minor adjustments to the programming of the lasers as well as special surgical techniques, he was able to generate very good results. He now continues to use these techniques with the new advanced Z-LASIK system which has meant that the vast majority of his patients achieve 20/15 or 20/12 vision post-operatively. For patients who require reading vision, Mr Barsam uses Z-LASIK to offer laser blended vision.

The combination of a world class surgeon and technology mean that Allon is able to safely treat prescriptions and conditions during laser eye surgery that most other vision surgeons cannot.


Mr Barsam has carried out research into how to optimize patient safety by using customisable flap dimensions. In fact, Allon was the first surgeon in the UK to carry out thin flap/small flap Z-LASIK to reduce dryness post-operatively. He customises all of his treatments to maximize both the safety and efficacy of laser vision correction.