OPERATION
Using the Remote
To effectively operate the CP-670, it will be important that you
understand and familiarize yourself with each function of the
remote control unit. It can be easily operated by aiming it directly
at the screen or by aiming it at the Chart Projector. Please take
plenty of time to accustom yourself to the various selections on
the remote control.
The diagram in Figure 6 and the descriptions listed below explain
each of the available selections.
“Lamp” On/Off Button
The
“Lamp”
button controls On/Off of the projection lamp from
the remote control. When initially depressed, the
20/400E
will
automatically be displayed. If the instrument is not operated for
more than 15 minutes, a series of warning “beeps” will sound
and the instrument will automatically shut off in seven seconds. If
a particular chart is needed for more than 15 minutes, depress
that chart button again after you hear the warning beeps.
The shut-off timer can be adjusted for a five minute period. Please
refer to Figure 8, Setting the Remote Control Code. When switch
#6 is turned on, the timer is set for 15 minutes; when #6 is off,
the timer is set for five minutes.
Snellen Charts
Eight snellen charts provide selections from 20/400 to 20/10 with
five 20/20 lines. Vertical isolations of the 20/20 chart will also dis-
play additional 20/20 lines.
Illiterate E’s
Four illiterate E charts provide selections from 20/100 to 20/15.
Number Charts
Five number charts provide selections from 20/200 to 20/10.
Child Charts
Three child charts provide selections from 20/100 to 20/20.
Vectograph Charts
The CP-670 is supplied with a variety of vectograph or “specialty”
charts including a unique Minute Stereo test chart. When a polar-
ized lens is presented to the patient after subjective refinement is
completed, the Minute Stereo test chart is viewed by the patient
in a 3-dimensional pattern with each symbol “floating” in space
beginning with the triangle and following in a clockwise pattern
to the circle, star, and then square. A correct response by the
patient accurately verifies subjective refinement.
Single Character Masking
Depressing the
single character masking button
will totally
isolate any single character on any acuity chart. To move the iso-
lation from side to side, depress the vertical masking buttons. To
move the isolation up or down to another line on the same
chart, depress the horizontal masking buttons.
Vertical Character Masking
Depressing the
left vertical masking button
will vertically iso-
late the far left line on any acuity chart. The
right vertical mask-
ing button
will vertically isolate the far right line on any chart.
Repeated depressions of these buttons will move the isolation
from side to side. Depressing either horizontal masking button will
allow you to move the vertical isolation up or down the selected
acuity range.
Horizontal Character Masking
Depressing the
top horizontal masking button
will horizon-
tally isolate the top line of any acuity chart. The
bottom horizon-
tal masking button
will horizontally isolate the bottom line of
any acuity chart. Repeated depressions of either button will allow
you to move up or down the selected acuity range.
Red/Green Filter
In addition to the separate red/green chart provided with the
vectograph charts, the CP-670 also gives you the capability of fil-
tering red/green over any appropriate chart with the exception of
the 20/400 and 20/300 charts. Filtering is also possible with all
illiterate E charts, and all child charts.
Program Buttons
The
program buttons
allow you to pre-program three separate
examination sequences. All charts are capable of program stor-
age as well as a "masked" chart selection.
To program and operate a personal selection of charts:
1. Depress the
Lamp Button
on the remote control to turn the
unit off.
2. Select the desired program button,
A, B, or C,
and hold for
five seconds. The instrument will "beep" and will immediately
display the fixation dot.
3
Figure 6
Special
Tests
Program
Functions
Red/Green
Filter
Illiterate E
Snellen
Charts
Children’s
Snellen
Charts
Movable
Masking
Options
(Vertical,
Horizontal,
Single
Character)
Alphabet
Snellen
Charts
Number
Charts
