Gilras GRU-5000 A, Operation Manual

Page: 30 / 68

Chapter 4 Operation
- 21 -
b) Selection of measuring method
According to whether A-Biometer probe will contact cornea, the measuring method is divided into
CONTACT method and IMMERSION method.
CONTACT method indicates the A-Biometer probe will contact cornea vertex directly. The
operator is required to handle the probe gently while measuring. It is applicable for both automatic
and manual measurement.
IMMERSION method indicates the A-Biometer probe will not contact cornea directly, but through
acoustic coupling medium.
The specific selection method is: click CONT or IMME key to choose measuring method, the
content of key will change accordingly (display CONT or IMME). Select a suitable method, or click
NORM key to open the MODE SETTING dialogue box. Please refer to item d) of this section.
c) Selection of eye model
According to the different conditions of patients, four EYE models can be selected, that are:
NORMAL, APHAKIC, SPECIAL and CATATACT. Open the MODE SETTING dialogue box to
select. Please refer to item d) of this section.
d) MODE SETTING dialogue box
Click NORM key to call out the dialogue box, as
shown in Figure 4.14.
The dialogue box consists of three parts, namely:
measuring mode setting, measuring method setting
and eye model setting.
Click the keys respectively to select AUTO or
MANUAL; CONTACT or IMMERSION; NORMAL,
APHAKIC, SPECIAL or CATARACT.
The acoustic velocity is the system's default setting. If CATARACT or APHAKIC is selected, the
system will change the acoustic velocity automatically.
If special eye is selected, the dialogue box pops up (as show in Figure 4.15) for selection of the
velocity of several common IOL. The types of IOL to be selected are: PMMA, ACRYLIC,
SILICONE or USERSET, among which, USERSET
is the type provided to users to input the required
acoustic velocity according to patient's condition.
Click specific position to select the corresponding
IOL acoustic velocity (indicator lights up), which is
displayed in the dialogue box. The value can be
modified but can't be saved as the instrument's
parameter. It is only used under the current
condition when SPECIAL eye is selected, quit the
Figure 4.14 Mode Setting Interface
Figure 4.15 IOL Acoustic Velocity Setting