Laser technology

At Vista Laser we invest in state of the art technology to achieve the best results for our patients. This allows us to carry out the All-laser LASIK surgical procedure which dispenses with the need to use blades or scalpels and is considered the most precise and reliable method.

The MEL 80 excimer laser system by Carl Zeiss has been designed to customise the treatment of each patient because it incorporates information about the topography and ocular aberrations of each individual eye. It has a pulse frequency of 250 per second and its beam is 0.7 mm in diameter with a Gaussian profile. 

The Eye Tracker system monitors the position of the eye 250 times per second using infrared cameras which pass information to the computer that controls the laser so even the slightest movements of the eye are detected. This means that the treatment is always perfectly centred. The cyclotorsion module eliminates postoperative astigmatism. The energy released in each pulse is ideal for precisely ablating microscopic amounts of tissue from the stroma.
 
The femtosecond laser manufactured by Ziemer allows the patient’s corneal epithelium to be separated without making an incision using a blade thereby conserving the maximum thickness of the cornea in the safest way. It functions by inducing photodisruption of the tissue. Its tiny pulses of energy pass through the transparent tissue releasing their energy at a predetermined depth, where the tissue is broken up and tiny bubbles of two microns in diameter consisting of air and carbon dioxide are formed. The adjacent tissue is left cold and unaffected. These pulses of energy are so brief that they are measured in femtoseconds, the shortest recognised unit of time equivalent to a quadrillionth of a second. But despite its incredibly brief duration, each pulse carries a high level of energy. It can also be used in applications such as the creation of tunnels to implant intrastromal rings for the treatment of keratoconus. In addition, it makes cornea transplant surgery much more precise.

Our CRS Master analyser of optical aberrations and topography, which is used both as a diagnostic aid and during the operation to guide the laser, examines the eye’s refraction at 1452 different points. As a result, the quality of vision is maximised by eliminating any optical aberrations and the treatment is customised for each specific area of the cornea.

Our Pentacam topography analyser creates a three-dimensional image of the cornea which allows the laser to correct any asymmetry or irregularity, thereby attaining a corneal surface which is geometrically perfect.