Nikon OT-8A User manual
A
UTO
OPTESTER
OT-8A
Instructions
NIKON
CORPORATION
TOKYO,
JAPAN
Cautions
•
Lens
(1)
Take
care
not
to
leave
dust
or
fingerprint
on
the
lens
surface.
(2)
Use
a
soft
lens
brush
to
remove
dust.
(3)
To
remove
dirt
or
fingerprints,
use
a
well-washed
soft
cotton
cloth
or
lens
cleaning
paper
moistened
with
a
small
amount
of
alcohol
or
lens
cleaning
liquid.
Do
not
rub
the
lens
too
hard.
(4)
Do
not
use
a
handkerchief
or
absorbent
cotton
wool
for
cleaning
the
lens.
•
Power
source
(1)
If
you
turn
OFF
the
power
switch
on
the
OT-8A
control
panel,
wait
for
at
least
5
seconds
before
turning
it
ON
again.
If
the
plug
of
the
power
supply
cord
is
disconnected
while
the
power
switch
is
ON,
wait
for
at
least
5
seconds
before
connecting
the
plug
again.
(2)
Set
the
power
voltage
to
be
used
into
the
voltage
indicator
window
of
the
fuse
holder
at
the
rear
of
the
control
panel.
(3)
Take
the
position
of
the
plug
to
put
in
or
put
out
the
power
source
cable.
(4)
The
symbols
indicated
on
the
power
supply
unit
have
the
following
meaning:
POWER
switch
Power
input
panel
o
OFF
(disconnection
from
the
power)
1
ON
(connection
to
the
power)
~
Alternating
current
(AC)
A
See
"Cautions"
and
"Instructions"
•B
Fuse
ft
B-type
equipment
•
Storage
and
room
conditions
(1)
The
OT-8A
control
panel
has
a
vent
in
the
case
to
keep
the
internal
parts
cool.
Do
not
block
the
vent.
(2)
Do
not
store
or
use
the
instrument
in
direct
sunlight
or
near
heating
equipment.
(3)
Do
not
store
or
use
the
instrument
in
a
damp
or
dusty
place.
(4)
This
instrument
is
a
precision
instrument.
Do
not
drop
or
jar
it.
Do
not
store
or
use
the
instrument
where
it
may
be
jarred
or
shaken.
(5)
Danger:
Take
care
not
to
let
any
liquid
(such
as
water)
or
metal
parts
into
this
instrument.
(6)
Do
not
place
anything
heavy
on
the
OT-8A
control
panel
during
use
or
storage.
i
(7)
Use
of
the
instrument
next
to
a
radio
or
television
may
cause
noise
on
the
radio
or
television.
If
a
device
generates
a
strong
magnetic
field
nearby,
it
may
cause
error
in
the
instrument.
(8)
Do
not
disassemble
to
the
instrument.
If
the
instrument
is
disassembled,
no
warranty
will
be
provided.
•
Others
Use
a
soft
cloth
moistened
with
water
or
detergent
liquid.
Do
not
use
benzine
or
thinner
or
other
volatile
chemicals,
because
the
instrument
cover
may
be
dissolved
or
change
color.
Do
not
spray
insecticide
over
the
instrument.
•
If
the
instrument
becomes
faulty
When
the
instrument
becomes
faulty,
overheats,
or
its
function
is
abnormal,
disconnect
the
plug
of
the
power
supply
cord.
Then
contact
the
Nikon
service
personnel.
Equipment
Supplied
1)
OT-8A
lens
chamber
x
1
2)
OT-8A
control
panel
x
1
3)
Near
point
chart
holder
x
1
4)
Near
point
chart
scale
x
1
5)
Near
point
chart
x
1
6)
Control
panel
fuse
x
2
7)
Printing
form
x
5
8)
Vinyl
cover
for
lens
chamber
x
1
9)
}
Incorporated
in
OS-300
when
this
auto
optester
is
to
be
purchased
together
with
connection
cord
the
opthalmic
console
10)
Connection
cord
lens
chamber
J
system
OS-300.
ii
Table
of
Contents
1.
Names
of
Parts
.
3
1-1.
Lens
Chamber.
3
1-
2.
Control
Panel
.
4
2.
Setting
.
5
2-
1
.
Installing
the
Lens
Chamber.
5
2-2.
Connecting
the
Cord
.
5
2-3.
Mounting
the
Near
Point
Chart.
6
2-4.
Leveling
.
6
2-5.
Turn
on
the
POWER
Switch.
6
2-
6.
Replacing
the
Paper
Roll.
7
3.
Adjusting
the
Comeal
Distance.
9
3-
1
.
Adjusting
the
Comeal
Distance
by
Normal
Measurement.
9
3-
2.
Diopter
Conversion
Table.
10
4.
How
to
Use
Keys
.
13
4-
1
.
Lens
Chamber
Display
and
Control
Panel
Keyboard
.
13
4-2.
Data
Input
Example
.
15
4-3.
If
an
Error
is
Displayed.
16
4-4.
If
Wrong
Data
is
Entered
.
17
4-5.
Functions
of
Each
Key.
18
(1)
Identification
(ID)
number
.
18
(2)
Entering
the
visual
acuity
(VA)
.
19
(3)
Calling
data
from
another
unit
.
20
(4)
Selecting
the
right
or
left
eye
.
22
(5)
PD
.
24
(6)
SPH,
CYL
and
AX
.
26
(7)
Auxilliary
lens
.
28
(8)
Using
the
cross
cylinder
.
31
(9)
Using
the
prism
.
35
(10)
Using
ADD
.
38
(11)
Using
data
memory
.
40
(12)
Changing
the
step
.
41
(13)
Converting
the
cylindrical
power
.
43
(14)
Converting
the
prism
.
44
(15)
Printing
.
45
(16)
Erasing
data
.
46
5.
Printout
Example.
47
6.
Multi
Remote
Control
.
49
6-1.
Types
of
Multi
Remote
Controls
.
49
6-2.
Operating
the
CHART
and
PRINT
Keys
.
49
6-
3.
Operating
the
PROGRAM
Keys.
51
7.
IC
Card
Reader/Writer
.
55
7-
1
.
Reading
the
IC
Card.
55
7-2.
Writing
Data
into
the
IC
Card
.
56
7-
3.
Types
of
IC
Card
Built-in
Data
.
56
8.
Maintenance.
59
8-
1
.
Replacing
the
Fuse
.
59
8-2.
Adjusting
the
LC
Display
Contrast
and
Buzzer
Volume
.
59
9.
Specifications
.
61
2
1
.
Names
of
Parts
1-1.
Lens
Chamber
Figure
1-1
(1)
Pole
arm
mounting
port
(=>
P.5)
(9)
Forehead
rest
adjustment
knob
(2)
Stopper
screw
hole
(=>
P.5)
(10)
Reading
rod
mounting
port
(=>
P.6)
(3)
Connection
cord
hole
(=>
P.5)
(11)
Lens
chamber
display
(=>
P.
13)
(4)
Connection
cord
connector
(=>
P.5)
(12)
Comeal
distance
window
(=>
P.9)
(5)
Arm
fixing
knob
(=>
P.5)
(13)
Sight
aperture
(6)
Cover
fixing
screw
hole
(=>
P.5)
(14)
Remote
control
transmission
window
(7)
Hanger
cover
(=>
P.5)
(15)
Level
(=»
P.6)
(8)
Leveling
knob
(=>
P.6)
3
1.
Names
of
Parts
1-2.
Control
Panel
(1)
Keyboard
(=>
P.14)
(9)
Buzzer
volume
adjustment
knob
(=*
P-5)
*(2)
Remote
control
receiving
window
(=>
P.47)
(10)
Liquid
crystal
contrast
adjustment
knob
(=>
P.59)
*(3)
Remote
control
rest
(ID
External
interface
connector
1
*(4)
Rear
remote
control
receiving
window
(=>
P.47)
(12)
External
interface
connector
2
(5)
IC
card
reader/writer
(optional
accessory)
mounting
part
(=>
P.55)
(13)
Connector
for
lens
chamber
connection
cord
(=>
P.5)
(6)
Printer
cover
(14)
Fuse
holder
(=>
P.59)
(7)
Printing
form
outlet
(=>
P.7)
(15)
Power
cord
socket
(=>
P.5)
(8)
LC
display
(16)
POWER
switch
(*
Remote
control
is
optional
accessory)
4
2
.
Setting
2-1.
Installing
the
Lens
Chamber
(1)
Insert
the
end
of
the
pole
arm
into
the
OT-8A
pole
arm
mounting
opening.
(2)
Rotate
the
OT-8A
lens
chamber
90°
against
the
pole
arm;
the
stopper
screw
hole
appears
on
the
bottom
of
the
OT-8A
hanger.
(3)
Fix
the
stopper
screw
into
a
hole
threads
of
the
pole
arm
from
this
hole.
The
OT-8A
is
then
fixed.
Note:
Do
not
forget
to
tighten
the
stopper
screw.
Pole
arm
2-2.
Connecting
the
Cord
(1)
Remove
the
OT-8A
arm
fixing
knob.
Remove
two
fixing
screws,
then
remove
the
lens
chamber
hanger
cover.
(2)
Fix
the
connector
for
lens
chamber
connection
cord
to
the
lens
chamber
and
control
panel.
(3)
Tighten
setscrew
(standard
&
Phillips
screw)
with
a
screwdriver
to
secure
the
connector
firmly.
The
connector
is
then
connected.
(4)
Mount
the
lens
chamber
hanger
cover.
Tighten
two
cover
setscrews
of
the
cover.
(5)
Tighten
the
arm
fixing
knob.
(6)
Connect
the
power
cord
socket
of
the
control
panel
to
the
AC
power
outlet
with
the
accessory
power
cord.
5
2
.
Setting
2-3.
Mounting
the
Near
Point
Chart
(1)
Insert
the
end
of
the
scale
rod
into
the
mounting
portion
in
the
center
of
the
lens
chamber.
Note:
Insert
the
scale
rod
from
the
oblique-upper
side.
(2)
Insert
the
chart
holder
from
another
end
of
the
scale
rod.
(3)
Secure
the
chart
to
the
holder
at
two
points
with
screws.
[Either
keep
the
scale
standing
or
remove
it,
in
cases
other
than
near
view
measurement.]
2-4.
Leveling
Turn
the
leveling
knob
to
set
the
lens
chamber
in
the
level
state
while
observing
the
level
of
the
OT-8A
lens
chamber
with
the
mirror
at
the
upper
side.
2-5.
Turn
on
the
POWER
Switch
Turn
on
the
power
switch
(press
the
switch
indicator,
the
lens
chamber
enters
the
initial
state
as
shown
below
in
a
few
seconds,
enabling
key
operation.
r
o
^
R
L
SPH
CYL
n
n
n
L'.
u
u
n
n
n
uu
u
t
O
n
t
u
u
AUX
X.
C
J
Figure
2-2
6
2
.
Setting
2-6.
Replacing
the
Paper
Roll
(1)
Insert
the
paper
(correct
side
up)
end
deep
inside
from
the
paper
inlet.
(2)
Keep
the
power
supply
ON,
then
press
the
f
|
key
of
the
control
panel.
The
paper
is
further
fed.
(3)
Pass
the
white
rod
through
the
paper
roll
and
fit
both
the
rod’s
ends
into
the
slots.
Notes:
1)
Feed
the
paper
before
fitting
the
paper
roll.
If
the
paper
roll
is
first
fit,
paper
feed
cannot
be
made.
2)
Do
not
insert
the
paper
upside
down.
3)
If
the
PRINT
key
is
pressed
before
paper
insertion
is
complete,
the
printer
prints
without
paper
and
the
print
head
may
be
damaged.
4)
Do
not
allow
foreign
matter
into
the
printer
or
the
paper
may
jam.
5)
Store
paper
away
from
heat
and
humidity.
6)
In
any
case,
if
you
are
going
to
store
the
data
for
a
long
time,
make
a
photo-copy
and
store
that.
The
printing
from
this
unit
might
deteriorate
over
time.
7
3.
Adjusting
the
Corneal
Distance
3-1.
Adjusting
the
Corneal
Distance
by
Normal
Measurement
For
normal
measurement,
set
the
comeal
distance
of
the
patient
to
the
position
shown
in
Figure
3-3
while
observing
the
OT-8A
comeal
distance
window.
Make
sure
line
12
is
on
=>
Turn
the
forehead
rest
=>
Adjust
the
position
of
the
the
triangle
base
mark
adjustment
knob
while
comeal
distance
to
line
12
watching
the
comeal
(At
this
time,
the
corneal
distance
position
of
distance
is
12
mm)
patient
Figure
3-1
Figure
3-2
Figure
3-3
If
comeal
(wearing)
distance
is
different
for
the
test
and
for
the
dispensed
spectacles,
convert
the
test
result
(if
more
than
5
diopters)
according
to
the
diopter
conversion
table
in
Section
3.2
(pages
9
and
10).
Example:
When
SPH-9.00D
was
obtained
with
the
comeal
distance
of
12
mm,
and
spectacles
are
dispensed
for
a
wearing
distance
of
15
mm,
the
prescription
is
as
follows.
(1)
"(-)
lens"
because
it
is
-9.00D.
"3
mm
away"
because
12
mm
-»
15
mm
(2)
Follow
the
line
of
"test
result
9.00D"
rightward.
(3)
Select
the
column
"(-)
lens
distance
by
3
mm."
(4)
SPH
-9.25D
is
the
prescription
for
the
spectacles.
9
3.
Adjusting
the
Comeal
Distance
3-2.
Diopter
Conversion
Table
Diopter
(D)
compensated
by
change
in
comeal
distance
(Change
comeal
distance:
1-6
mm)
Change
comeal
distance
(mm)
Test
result
(D)
Longer
in
case
of
(+)
lens
Shorter
in
case
of
(-)
lens
650
646
650
643
•
r
692
a
41
9.90
1450
1429
1600
1478
16
50
1626
16
00
16
75
2
3
4
5
446
444
442
4
40
495
493
490
488
644
641
638
635
693
689
686
683
642
638
634
630
690
686
6
81
6
76
7.39
7.33
7.28
7.23
7.87
7.81
7.75
7.69
636
629
622
615
684
676
6
69
6
61
632
6
24
615
607
680
671
662
652
16
28
10.18
1608
698
16
65
10.54
10.43
11.24
11.12
10.99
16
87
11.72
11.58
11.45
11.32
12.20
12.05
11.90
11.76
12.67
1Z
51
1Z
36
1Z
21
16
15
1Z97
1Z81
1Z
65
1662
1644
1626
16
08
1409
1690
1671
16
52
1456
1435
1415
16
95
1603
14
81
14
60
14
39
16
50
16
27
16
04
14
81
16
97
IS
16
48
16
24
16
44
16
92
16
67
16
91
wm
1636
16
09
17.37
17.08
1679
16
51
17.84
17.53
17.23
1693
16
30
17.98
17.66
17.35
16
77
1642
1609
17.77
19.23
16
87
1652
16
18
Shorter
in
case
of
(+)
lens
Longer
in
case
of
(-)
lens
16
78
17.06
17.29
17.60
17.81
ia
13
1633
1667
16
85
1621
19.37
16
75
1689
20.29
20.41
20.83
4
5
458
460
610
613
662
666
615
619
667
672
7.20
7.25
7.73
7.79
6
26
633
6
80
688
634
642
688
697
16
42
10.53
10.96
11.08
11.51
11.61
1Z
05
1Z
20
1Z
61
1Z
77
16
16
1633
1671
16
90
1427
14
48
1483
16
05
1639
1663
16
96
16
22
16
52
16
80
17.09
17.39
17.67
17.98
1624
16
58
1682
19.18
19.40
19.78
1698
20.39
20.56
20.99
21.15
21.61
21.74
2Z22
10
3
.
Adjusting
the
Corneal
Distance
Diopter
(D)
compensated
by
change
in
comeal
distance
(Change
comeal
distance:
7-12
mm)
11
4
.
How
to
Use
Keys
4-1.
Lens
Chamber
Display
and
Control
Panel
Keyboard
(1)
Lens
chamber
display
Convergence
indicator
lamp
(lights
on
—»
Used
lights
off
—>
Not
used)
13
4.
How
to
Use
Keys
(2)
Control
panel
keyboard
(15)
(17)
(19)
(21)
(23)
(24)
(26)
(14)
(
10
)
Figure
4-2
(1)
Data
selector
keys
(14)
PRISM
key
(2)
Auxiliary
lens/ten
keys
(15)
Auto
ref.
data
input
key
(3)
ENTER
key
(16)
Auto
lensmeter
data
input
key
(4)
RIGHT
and
LEFT
keys
(17)
FAR
keys
(5)
Binocular
sight
key
(18)
NEAR
keys
(6)
Spherical
power
+/-0.25D
step
keys
(19)
Step
key
(1)
(Coarse
step)
(7)
Cross
cylinder
keys
for
cylindrical
power
(20)
Step
key
(2)
(Fine
step)
(8)
Cylindrical
power
+/-
0.25D
step
keys
(21)
Cylindrical
power
transposition
key
(9)
Cross
cylinder
keys
for
cylindrical
axis
(22)
XY/BS
key
00)
Cylindrical
axis
+/-
5°
step
keys
(23)
CLEAR
key
(11)
PD
keys
(24)
PAPER
FEED
key
(12)
ADDITION
key
(25)
COPY
key
(13)
Cross
cylinder
OFF
key
(26)
PRINT
key
14
4.
How
to
Use
Keys
4-2.
Data
Input
Example
Example:
R
S-4.25,
C-0.75,
Ax
165°
L
S+0.50,
C-0.25,
Ax
90°
For
above
data
input,
press
keys
in
the
following
sequence:
Notes:
1)
If
any
one
[sphjT
>
cyl^
f
or
ax^Q]
key
is
pressed,
then
another
SPt
J^
,
(
cyl
/4|
,
or
AX
js,
or
|°enter
|
key
is
pressed
without
pressing
the
ten
key,
the
2
)
data
is
reset
to
the
original
and
the
lens
in
the
sight
aperture
remains
unchanged.
(Note
that
the
data,
once
entered,
will
not
return
to
the
original.)
When
the
|
5P
%,
,
|
CYL
/4i'
,
or
AX
/kJ
key
is
pressed,
the
tenkey
pad
acts
as
in
the
standard
state.
The
tenkey
pad
acts
as
"+"
when
the
(f)/-/'
key
is
pressed.
Specification
of
the
standard
state
as
"+"
is
possible.
(Contact
your
Nikon
representative.)
15
4.
Haw
to
Use
Keys
4-3.
If
an
Error
is
Displayed
•
Data
input
is
possible
within
the
following
input
range.
Error
is
displayed
on
the
LC
display
of
the
control
panel
when
the
input
data
is
over
range.
When
error
is
displayed,
press
again
the
corresponding
f
AX
/
g,
key.
Then,
re-enter
the
data
with
the
tenkey
pad.
Error
display
example:
Error
display
•
SPH
-28.50
~
+26.75D
•
CYL
-7.00
~
+7.00D
CYL
(Note
however
that
-28.50D
^
SPH
+
^
—
+26.75D)
•
AX
0-180°
•
Prism
For
XY
indication
PX
-20.00
-
+20.00
PY
-20.00
-
+20.00
For
R
or
0
indication
P
0
~
+20.00
BS
0
-
360°
(Note
however
that
-20.00
<
VPX
2
+
PY
2
<
+20.00)
16
4.
How
to
Use
Keys
4-4.
If
Wrong
Data
is
Entered
When
the
data
is
found
to
be
wrong
during
entry,
press
again
the
sph^/J
,
cyl/
,
or
|
ax^>
key
for
which
wrong
data
is
being
entered.
Re-enter
the
data
with
the
ten
key
pad.
Note:
The
LED
lamp
of
the
ENTER
key
flickers
to
indicate
that
data
input
is
under
way.
Flicker
-
ENTER
While
this
lamp
flickers,
the
lens
cannot
be
moved
with
other
keys
such
as
17
4.
Haw
to
Use
Keys
4-5.
Functions
of
Each
Key
(1)
Identification
(ID)
number
Set
or
change
the
ED
number
for
identifying
each
customer.
Use
the
marked
keys.
pjj&If-S
1
mi
CUSS©'
’WIS
Aft
©isi
V
-
-.V
J
gu
gib
tsa
mm
i
•
To
set
or
change
an
ID
number:
Press
the
f
id
1
key;
letters
ID
appear
on
the
LC
display
of
the
control
panel.
Enter
the
required
ID
number
of
up
to
10
digits
using
the
ten
key.
Operator
panel
key
Function
LC
display
on
control
panel
Lens
chamber
display
example
C
ID
J
Displays
letters
ID
on
the
LC
display
of
the
control
panel.
This
unit
is
placed
into
the
ID
number
entry
wait
state.
SPH
CYL
AX
*R
0.00
0.00
180
0
L
0.00
0.00
180
0
ID
R
0.00
SPH
0.00
CYL
PdR
180
A
X
32.0
Ten
key
Used
to
enter
an
ID
number
with
up
to
10
digits.
SPH
CYL
AX
*R
0.00
0.00
180
0
L
0.00
0.00
180
0
ID
1234567890
No
change
Stores
the
entered
ID
number.
SPH
CYL
AX
*R
0.00
0.00
180
0
L
0.00
0.00
180
0
:.
^
_ID
display
*.
1
disappears
No
change
Notes:
1)
If
you
press
a
wrong
key
by
mistake,
just
start
again
from
the
first
step.
2)
When
this
OT-8A
Auto
Optester
interfaces
with
the
Nikon
Auto
Refractometer
NR-5000
or
NR-5100,
the
ID
number
of
the
meter
is
stored
if
no
ID
number
is
set
using
the
OT-8A.
18
4
.
How
to
Use
Keys
(2)
Entering
the
visual
acuity
(VA)
Set
or
change
the
visual
acuity.
Use
the
marked
keys.
p*
im
j
To
set
or
change
the
visual
acuity:
Press
the
f
va
|
key.
—>
Letters
VA
appear
on
the
LC
display
of
the
control
panel.
Enter
the
visual
acuity
with
number
0.01-
9.9
using
the
ten
key.
Operator
panel
key
Function
LC
display
on
control
panel
Lens
chamber
display
example
Displays
letters
VA
on
the
LC
display
of
the
control
panel.This
unit
is
placed
into
the
visual
acuity
entry
wait
state.
SPH
CYL
AX
VA
*R
-2.
00
-0.25
180
0
j
j
L
-1.50
0.00
180
0CC
to.
0
The
blank
part
is
in
the
entry
wait
state.
R
-2.00
SPH
-0.25
CYL
PdR
180
AX
32.0
Ten
key
Used
to
enter
the
visual
acuity.
SPH
CYL
AX
VA
*R
-2.00
-0.25
180
0
1.0
L
-1.50
0.00
180
OCC
0.0
No
change
Stores
the
entered
visual
acuity.
No
change
No
change
msm
Notes:
1)
If
you
press
a
wrong
key
by
mistake,
just
start
again
from
the
first
step.
2)
The
visual
acuity
value
for
the
right,
left,
and
right
and
left
eyes
can
be
stored
in
the
FAR1,
FAR2,
NEAR1,
or
NEAR2
mode.
3)
While
the
SPH,
CYL,
and
AX
values
are
left
initialized
and
before
data
is
entered,
the
visual
acuity
of
naked
eye
(VAN)
can
be
entered.
The
procedure
is
the
same.
SPH
CYL
AX
VAN
*R
0.00
0.00
180
0
:
"i
L
0.
00
0.
00
180
0CC
/O’
The
blank
part
is
in
the
entry
wait
state.
19
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