Page 65 - The Book Pi in eye

Pi in eye

The procedure is simple and easy. The patient is wheeled into the
laser suite. The name and identity of the person and eye to be
operated upon is confirmed per protocol. Numbing eye drops are
instilled and the eye dilated. A marking pen is used to make
orientation marks. The patient is then positioned under the laser. An
eye retainer is placed. At this time the eye does not have to be
prepped as this is noninvasive step. Any instillation of drops that
sting can prevent eyes from focusing on the light. Iodine which is
colored can interfere in the working of the laser. The patient is asked
to look at the blinking red light. Even if vision is obstructed by
advanced cataract patients are able to perceive the direction of this
light. The docking mechanism is engaged. The laser works to carry
out the instructions programmed.

Fig 8.2 Capsular opening being performed. Right side displays the
opening in pink lines.

The opening in the lens bag or capsulorhexis is made first. This is
followed by the patterned breakup of the lens. It can be cut into 2, 4
or 6 pieces. The center core may be delineated too. The depth of
these lenticular cuts can again be controlled. Next the arcuate
incisions for decreasing the astigmatism are made. Either one or two
incisions can be made. The length, the distance from the center and
the depth of each astigmatic keratotomy incision can be coordinated
independently. Finally either one or two side port openings and the

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