Smart532
™
Clinical Guide
UM-1151440EN, Rev. C, May 2016 A-15
procedures performed on slit lamp or LIO, the pulse duration should
be kept at 0.5 sec or less, to ensure that during treatment the patient
does not move.
● Spot sizes are usually 200-1000 µm. In some cases, such as when
treating close to the center of the macula, smaller spot size such
as 50-
100 µm should be used, so as to prevent inadvertent targeting of
the
fovea.
● For treatment of diabetic retinopathy in advanced (proliferative)
stages, pan-retinal
photocoagulation (PRP) is performed: The ischemic
conditions
characteristic of this condition are alleviated by confluent
photocoagulation of 30-50% of the retina. Care should be taken to
exclude the macula. Laser burns should be applied in a checker-board
pattern, usually with spacing of 0.6-1.0 spot size between adjacent
burns. This procedure requires ~1000-2000 burns. It may be split in
two or more consecutive sessions.
●
Note
● Users should be aware of general laser warnings, precautions,
and adverse effects listed in General Information in this
chapter.
● Refer to the Ophthalmology references in this chapter for
literature regarding anterior chamber laser procedures.
Other uses of the laser in ophthalmology involve the anterior segment of
the eye. The most common procedures are performed to reduce the
intraocular pressure in angle closure glaucoma (with iridotomy) and in
open angle glaucoma (with trabeculoplasty).
Warning
● Following iridotomy or trabeculoplasty, intraocular pressure
(IOP) should be closely monitored.
● Hemorrhage from the trabecular meshwork occasionally
occurs and is manifested as an ooze of blood from
Schlemm's canal to the site of laser impact. This can be
easily stopped by increasing the pressure of the gonioprism
to the cornea.
● Pupillary distortion may be encountered if the iris root or
peripheral iris has been treated. This distortion may or may
Laser Procedures
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