18
123 Chart to children test. These 5 charts can also be switched with
，
button on the remote control. Press
together with
or
button, the
size of the chart can be changed.Press
or
button can choose more different
charts. Other charts operation is similiar to E chart.
H: shileding: press the
，
，
button to choose single letter shiled, single
line shilde or single row shield. Under shilding mode, can choose shileding area by
pressing the 4 direction buttons,. Press the
，
，
buttons again to cancel
shiedling.
I: Red/green background: oress the
button to show red/green background, press
it again to cancel.
J: Color inverse: press
button, the color of the background color and chart color
will be exchanged. Press it again the color will exchange again.
K: Contrast: press
button to get into the contrast adjust interface.
L: ETDRS
：
press the ETDRS button to get into the ETDRSinterfac. Press this button
to switch charts. Under ETDRS mode, press
button for shielding of sigle
line.
M: Color blind test
：
press button
to enter color blind test. Press this button or up
and down button to switch different charts.
N: Stereo ests: press the
button on the remote control to enter stereo test, and
press the same button to chage charts.
O: Astigmatism test: press the button to get into astigmatism test. Every time press
the left and right button, the indicator on the chart will move forward or backward 1
°
.
Keep pressing on the left or right button the indicator will keep moving. Every time
press on the up or down button, the indicator will move forward or backward 45
degrees. Press the button again to check the measurement result. Under this mode,
press the left/right/up/down button will not work.
P: Screen saver: when press the SCR button on the remote control or no any operation
within 15 minutes, the device will go into screen saver mode, and will be
re-activated when there is any operation or press any other button on the remote
except for SCR.
