In the same way that every person is unique, no two eyes are exactly the same. This is why standard laser treatments of myopia, hyperopia and astigmatism which do not take these variations between eyes into account do not achieve the optimal results. It is, therefore, necessary to analyse each eye in depth in order to detect irregularities or corneal asymmetries and measure these ocular aberrations so they can be accurately corrected thereby giving the patient the best quality of vision possible.
At Vista Laser Ophthalmology, we divide each patient’s optical zone into 1452 different areas and analyse each one individually so that the treatment can be customised for each of these different areas of the eye’s surface.
Aberrometer Guided Treatment
The ocular defects in the human eye that have the most profound effect on vision are myopia, hyperopia and astigmatism, but there are also other imperfections that have no effect on the eye’s ability to focus, but influence the quality of the image projected by the cornea onto the retina making vision less sharp; these are known as high level ocular aberrations. When these ocular aberrations are of such a degree that they affect the patient’s postoperative quality of vision the aberrometer is used to correct them with the laser.
Correction of these ocular aberrations using wave-front guided technology allows us to improve aspects such as the quality of night vision, the capacity to differentiate between shades of colour or degrees of contrast and resistance to glare
In our treatment, which is customised using wave-front technology, the application of the laser is guided by the information obtained from our aberrometer.
The human eye is not a perfectly regular lens with a surface like a snooker ball or an egg. Particularly in astigmatic eyes, there are small irregularities that have a detrimental effect on vision quality.
Standard corrections of refractive errors using glasses, contact lenses or traditional laser surgery, treat the eye as though it was perfectly regular and therefore apply a single degree of correction over the whole area. With the aberrometer we divide the field of vision into 1452 segments and by examining these different subsections we can analyse the precise degree of correction that is necessary for each one.
This opens up the possibility of designing a specific treatment for each eye, improving the quality of vision for those patients who present with ocular aberrations of such a level that would negatively affect the final results achieved.
Topography Guided Treatment
The topography analyser creates a three-dimensional image of the cornea which allows us to detect any asymmetry or irregularities in the inner and outer surfaces. If these irregularities are serious enough to prevent a good outcome with the standard surgery, a treatment guided by the eye’s topography is available to modify the curvature of the cornea while at the same time smoothing out any irregularities on the surface.
At Vista Laser we can offer you the possibility of combining optimised laser surgery, which maintains the eye’s aspheric profile, with wavefront-guided customised treatment controlled by a topography analyser, which corrects corneal irregularities, in order to achieve the best possible results for each individual patient.
The MEL 80 laser by Zeiss has received approval from both the American FDA and the European Union.