Contact Lenses for
eyes that have had Lasik or Laser refractive surgery
Mesa Contact Lenses - are
designed for eyes that have had vision corrective Lasik or laser
refractive surgery and do not have optimal vision correction.
Laser and Lasik refractive surgery can
result in irregularities of the cornea. In the event that they can
not be corrected with further procedures, fitting with contact
lenses may be required. Due to the unusual shape that results from
laser refractive surgery a special contact lens is required for
fitting. The mesa lens is designed to mimic the shape resulting from
this procedure. Contact lenses are indicated when not enough
correction is available or the cornea has "twisted" or
become irregularly astigmatic. The cornea is the clear part of the
eye in front of the Iris where upon the surgery was performed.
Astigmatism refers to the shape of the eye having different powers
across different meridians. The Mesa lens is an excellent choice for
this type of correction.
Radial Keratotomy (RK) was a
corneal surgery that was performed prior to the advances of Laser
surgery. RK surgery consists of scalpel cuts radiating from the
inner 5 millimeters of the cornea. RK eyes that ended up with
irregular astigmatism may also benefit from the Mesa design.
In rare circumstances, refractive
surgery has been performed on eyes that may have had Keratoconus or
had been pre-Keratoconus. Keratoconus is a progressive disease
whereby the cornea becomes gradually thinner. The end result can be
a cornea that can no longer hold its shape and become cone shape.
Soft aspheric lenses specifically design to mimic the specific
corneal contours may be fitted if other lenses prove ineffective. In
extreme circumstances a cornea transplant may be required.
Corneal ectasia is a condition where the
cornea begins to protrude after being thinned too much from
refractive surgery. Picture a garden hose sitting on your driveway
beginning to bulge in a particular spot from the build up of
pressure. The result can be blurred
vision form the irregular shape. Custom contact lenses can be
designed to correct the vision.
Cornea with Lasik
The above cornea map
shows an eye that had Lasik performed. The shape became uneven and
requires a special lens to full correct the vision.
Mesa Contact Lens - The trademark
shape is the plateau shaped cornea. The Mesa lens is designed to accommodate
the "reverse geometry" induced by refractive surgery. The
traditional eye is round in the center of the pupil and becomes
flatter towards the white of the eye. With reverse geometry, the eye
is flatter at the center of the pupil and becomes steeper at the
white of the eye.
Mesa contact lenses are designed to
fit flat in the center and steeper in the periphery. This contact
lens design increases the comfort for a myopic corrective surgery.
Laser, Lasik and RK refractive
surgery can also result in an eye with a regular astigmatic shape
whereby Toric soft lenses may work adequately in some circumstances.
Design Ltd. also is a dealer for Synergeyes PS (post surgical) lens,
which is a hybrid soft lens with a semi rigid gas permeable center.
This lens is specifically deigned for the cornea that has had