Canon’s TX-F Full Auto Tonometer
Around one in 17 people aged 40 or
over suffer from glaucoma, one of
the leading causes of eyesight
deterioration. Non-contact Tonometers
are often used in the screening and
treatment of glaucoma.
With a non-contact Tonometer, an air
puff nozzle built-in the center of
objective lens is placed very close
to the surface of the patient’s eye.
A puff of air is then blown at
center of the cornea, and an
instrument calculates pressure from
the change in the light reflected
off the cornea. One problem with
this method is that measurement
errors can easily occur if the air
puff nozzle is not placed in exactly
the right position. The patient’s
eye often moves, which necessitates
special adeptness on the part of the
operator due to the difficulty of
aligning the machine manually
according to the eye movement.
comprehensively addresses these
issues. This revolutionary device
enables the operator to measure
intraocular pressure of both eyes
automatically, by simply pressing
the start button. Canon developed
the following technologies in the
course of achieving full automation
of the intraocular pressure
measurement procedure.
|
Nozzle Portion
View
from Patient's Perspective
|
|
Selectable measuring modes |
|
 Choose
from either Full Auto, Auto, or
Manual to match the situation.
In Full Auto mode, you can set
the TX-F to take 1 or 3
measurements for each eye, and
it will perform alignment and
measurement on both eyes after
you press the Start button.
Printout or data transfer can be
automatic. In Auto mode,
alignment and measurement are
automatic, with only one
measurement taken at a time.
And in Manual mode, you
have full control over alignment
and focusing using the trackball
and roller. Guides are marked on
the central alignment ring to
make it as easy as possible to
align the two bright dots
reflecting on the patient's
cornea. |
|
IOP warning display |
 
The TX-F
helps you diagnose ocular
hypertension without delay by
displaying a warning message
whenever high pressure is
detected. You can enter any
threshold value on the unit's
settings screen, and this
will activate the TX-F's warning
system for that value. When
running the TX-F in Full Auto
mode, operation will also be
halted when the threshold is
exceeded. |
|
Visual confirmation of errors |
Normally, if
a measurement error occurs, you
can’t be completely sure of its
cause. Not so with the TX-F.
When a reading can't be made,
the TX-F will show you a
snapshot of the examinee's eye,
giving you the information you
need to correct things. At a
glance, you'll know whether it
was an eyelid, eyelash, or the
eye being out of position that
caused the error. A short
message will tell you what
action to take, such as
adjusting the chin rest or
limiter. |
|
Display by order or reliability |
|
 During
measurement, results are
displayed near the bottom of the
monitor. And, after the exam,
you can access a display screen
that lists IOP measurements
stored in memory. Internal
memory provide storage of up to
10 measurements for each eye,
and these figures can be listed
either in the order they were
taken or by reliability. |
|
Centralized controls and more |
|
Alongside
the trackball and roller, the
TX-F features a control panel
that puts keys for all major
functions in one area. So
whether you're switching the
measurement mode or just want to
adjust the chin rest, you can
get anything done with maximum
ease. As an added advantage, the
design of the TX-F offers easy
access to the examinee's eye if
necessary. |
|
Extremely soft air puff |
|
 For
most patients, the only thing
remarkable—and worrisome—about
tonometry is the air puff. Which
is why it's important to ensure
that this puff is as comfortable
for them as can be. The TX-F
employs one of the most delicate
air puffs of any noncontact
tonometer. |
|
Benefits have
been built into virtually every
part of the TX-F. When it’s not
in operation for 3 minutes, for
example, the power-saving mode
automatically kicks in. Printing
is fast, and an RS232C interface
is
included for data transfer to an
external device. In addition,
since the power cord connects to
the bottom of the unit, the TX-F
contributes to a tidy setup as
well. |
|
Specifications
|
Type |
Non-contact type |
|
|
Measurable range |
0 to 60 mmHg
Includes automatic shifting between
30 / 60 mmHg. |
|
|
Measuring increment |
1 mmHg |
|
|
Operation distance |
11.3 mm from the front of nozzle |
|
|
Observation range |
Approx. 15 x 12 mm |
|
|
Alignment |
Full Auto / Auto / Manual |
|
|
Memory |
Max. 10 measurements for each eye |
|
Data output |
RS232C |
|
Power-saving system |
Available |
|
Display |
5-inch monochromeCRT monitor |
|
Printer |
Thermal line printer |
|
Power supply |
AC100 – 240V, 50 / 60Hz, 0.4 – 0.8A |
|
Power consumption |
Approx. 80VA |
|
Operating range |
Front / back: 40 mm
Left / right: 90 mm
Up / down: 30mm |
|
Dimensions
(W x D x H) |
280 x 520 x 495 mm (11.0 x 20.5 x 19.5
in.) |
|
Weight |
20.5 kg (45.2 lbs.) |
|
Components |
|
|
Optional accessories |
|
Main unit |
1
|
|
Chin rest paper |
|
Objective
lens cap |
1 |
|
Printing paper (TP-58)
|
|
Chin rest paper |
100 sheets |
|
Motorized table |
| Printing
paper (TP-58) |
2 rolls |
|
|
|
Power cable |
1 |
|
|
|
Dust cove |
1 |
|
|
|
Blower brush |
1 |
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