A-Scan Operation and Use
Section 3
3 - 4
Following entry of user and patient information,
A-scan measurements may be obtained. Select
the
[ MEASURE ]
button from any screen to
display the Measure Screen (see Figure 3-5).
Figure 3-5 Measure Screen Display
DIRECT CONTACT SCANNING IN
AUTOMATIC MODE
The EZ-S
CAN
is able to recognize an
acceptable A-scan pattern and automatically
capture the image, depending upon the type of
measurement to be made.
1.
Examination Mode
. Ensure the correct
examination mode is selected as indicated by
the mode button in the upper right corner of
the Measure Screen. The examination mode
may be changed by repeatedly touching the
mode key until the desired mode is shown.
The following automatic capture modes are
available:
¾
Cataract
¾
Dense Cataract
¾
Aphakic
¾
Pseudophakic
¾
Manual Mode
When Pseudophakic mode is selected, one
of five different pseudophakic lens types
(PMMA, Acrylic, Silicone-I, Silicone-II or a
User “Custom” Lens) may be selected
touching the
[ LENS ]
key. The average
tissue velocity will be automatically adjusted
for the selected lens type. The velocity for
the “Custom” lens can obtained from the
manufacturer and entered by the user.
2
. Tissue Velocity
. In Auto Mode, the EZ-
S
CAN
will select the correct number of
gates to use as well as the appropriate
velocities. Insure that the appropriate tissue
velocities are selected by pressing the
[TVEL]
key once a particular Eye Type is
selected. The user has the option of changing
the velocity for any area by pressing the
appropriate key (TVEL1, TVEL2, etc.) In
Pseudophakic Mode, the user can also select
a “Custom” lens by pressing the
[TVEL]
key and then selecting
[CUSTOM LENS]
.
(See Figure 3-6). Press
[ADD LENS]
and
type the Lens Name followed by
[ENTER]
.
Type the axial correction (if known)
followed by [
ENTER
] (if not known,
simply press [
ENTER
]; then type the
correct velocity followed by [
ENTER
].
Figure 3-6 Custom Lens Selection
In Manual Mode, the user can select the
number of gates (2, 3 or 4) by pressing the
[
#GATES
] key, as well as selecting the
appropriate velocities for each area. (See
figure 3-7).
3.5
PATIENT EXAMINATION
