Custom Wavefront-Guided Lasik
90%
or more of optical aberrations are due to the distortion of
light rays which pass through the imperfect cornea. These
aberrations created common refraction errors such as myopia,
hyperopia and astigmatism which can be corrected by optical
devices and conventional laser eye surgery such as Lasik,
PRK etc.
Another 10% of optical
aberrations are due to “higher order aberrations” such as
chromatic aberration, spherical aberration, diffraction,
curvature of field, coma, trefoils and quadrafoils. These
only affect a small group of people, i.e. about 10% to 15%
of population. However, each case of higher order aberration
is unique to individual patient. To correct this type of
vision problem, Wavefront-guided Lasik could be the best
option. This technique provides a completely customized
reshaping of cornea.
Wavefront-Guided
Lasik is also
known as
Custom Wavefront Lasik.
It is an advance type of vision correction procedure which
uses Wavelight Allegretto excimer laser. It is the same
technology used by astronomers to sharpen distorted objects’
image at distances. This wavefront measurement technique
could detect the specific topography of each unique
individual eye’s surface which could not be obtained using
standard Lasik measurement. With this advance technique,
this procedure could provide a near-perfect vision and helps
to avoid night vision side effects.
Custom
Wavefront Lasik procedure
is about the same as standard Lasik. The difference is the technology used. Firstly,
higher order optical aberrations are measured using
Aberrometer System to create a corneal map. The surgeon will
then proceed with the cutting of flap using either blade or
laser. Corneal map created earlier by Wavefront diagnostic
will then be used as guidance for corneal ablation. With
Wavefront-guided ablation, surgeons are allowed to ablate
deeper and fix higher order aberrations.
Although Wavefront-guided
Lasik can provide superior vision quality, patients with
thin corneas are not the candidates as this procedure
requires deeper ablations. Besides that, people with large
pupils might not be able to undergo this procedure too due
to its limited zone for ablations.
