The following chart is for you to print out as a
quick reference to the various software features to the
IOL Master.
For more detailed information, click on any of the software icons.
patient database
N key.
Patient database. This allows you to enter new patient data, or review prior
measurements from established patients. Depending on how the IOL Master
software has been configured by the user, this information will be stored
anywhere from 5 to 100 days. After that time, patient information will
automatically be deleted in order to conserve space on the IOL Master
hard
drive.
overview
O key.
This is the overview mode, which allows for coarse image
alignment prior to taking measurements. In this mode, the patient is
aligned with the instrument by using the joystick. Tell the patient to look
straight at the small yellow fixation light and then adjust the
instrument-to-patient distance until the six light reflections on the
cornea appear to be in focus. The small circle of lights and the cross
hairs should be approximately centered in the patient's pupil. This
should be done prior to taking axial length measurements.
axial length measurement
Akey, or the pushbutton on the joystick. This
activates the axial
length measurement, or "ALM", mode. Ask the patient to look directly
at the
small red fixation light and then take all 20 measurements. Be sure to
use
the Best Measurement Technique and
sample several areas within the
measurement reticule until the best axial length display is obtained.
Continue to take measurements from that area. At least four
measurements
should be within 0.02 mm, and show an Ideal Axial Length Display. Delete
those measurements that do not show an acceptable axial length
display. It
should be remembered that the quality of the axial length display is
usually
more important than the signal-to-noise ratio. Use the space bar to go
to
the next measurement mode. With the IOL Master, you can
accurately determine
the axial length of eyes ranging from 14.0 mm to 40.0 mm.
keratometry
K key.
This activates the automated keratometry, or "KER", mode. The
best measurements are obtained as follows: place a drop of artificial
tears
in each eye, have the patient blink several times, and then do all
measurements with both eyes open as wide as possible. Remember to tell
the
patient to blink between each measurement. Take as many measurements
as
needed until good reproducibility has been established. Those
measurements
that show wide variability should be individually deleted. Typically,
a set
of good automated keratometry measurements will all be within 0.25 D
in each
meridian. When done properly, this feature of the IOL Master is
highly
accurate. Use the space bar to then go on to the next measurement
mode.
white to white
W key. This activates the
White-to-White, or "WTW" mode. This optional
function is part of
Software Option A. To measure the horizontal
corneal
diameter, align the instrument and make sure that the iris structures,
or the edge of the pupil, appear to be optimally focused. Confirm that
the
patient is able to see the fixation target and is looking straight at
it. If
the patient fails to fixate properly, the visual axis will be out of
alignment, which may result in measurement errors.
anterior chamber depth
D key. This activates
the anterior chamber depth, or "ACD", mode.
Keratometry must be performed prior to the anterior chamber depth
measurement. In this mode, the system will automatically activate the
lateral slit illumination. To the patient, the lateral slit
illumination
will appear very bright and this should be mentioned prior to
measuring the
ACD. Throughout the anterior chamber depth measurement, the patient
should
continue looking straight ahead and directly at the small, yellow
fixation light, not the bright illumination to the side.
IOL calculation
I key. This activates
the IOL calculation mode. Intraocular lens power calculations can be made using five different formulas after obtaining the necessary measurements (AL, ACD and Ks) from one eye, or both. Before the system calculates IOL options, you must enter the desired lens type(s) into the IOL database.
printer
P key. This allows you to send a
summary of the measurement information
to your printer. This summary includes a listing of all 20 axial
length
measurements, a graphic representation of the axial length display
with the
highest signal-to-noise ratio, the three selected keratometry values,
all of
the ACD measurements, and three WTW values with a graphic
representation of
the iris, visual axis and optical axis (if software option A has been
installed). If you would like to print an individual axial length
display,
simply select the axial length display you would like to print using
the
cursor and then press the printing shortcut keys (CTRL + P). You may
also
print the screen from the white-to-white mode, by pressing the
printing
shortcut keys (CTRL + P).
export data to PC
S key. This exports data from the
IOL Master to connected office management systems or to another
computer. It requires a connection via the serial port. Before the
export of data, select the export mode appropriate for the connected
office management system via Options > Setup >
Program Settings.
export data to diskette
X key. This exports
patient measurement information to diskettes. Data
is made available in a text file (IOLMexport.csv) for archiving and
data analysis.
shut down
E key. This exits the IOL Master
software and Windows. In case of problems, turn off the power switch
and disconnect the power cable!
Please check back at regular intervals for software
updates.
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