Specifications - Canon TX-F Operation Manual

11. Specifications

Purpose
Type
Measurable range
Measuring increment
Operation distance
Measurement mode
Measurement accuracy
16mmHg>GAT mmHg
23mmHg>GAT>16mmHg
GAT 23mmHg
Total
(Compared with Applana-
Observation range
Memory
Printer
Data output format
Range
TX-F
tion Tonometer)
Measurement of intraocular pressure of human eye
Non-contact type
0 to 60 mmHg (0 to 30 mmHg / 25 to 60 mmHg
changes automatically)
1 mmHg
Approximately 11 mm from front of nozzle
Fully automatic, automatic and manual modes
ISO standard: Percentage of measurements out of tol-
erable range must be under 5%.
Number of mea-
Number of
surements out of
measured eyes
tolerable range
298
198
42
538
Data of some eyes have been excluded from the above
data due to following reasons:
Phthisis bulbi (1 eye), corneal erosion (1 eye), unstable
stare (1 eye), keratitis (1 eye), too many blinks (31
eyes)
Regression and correlation:
Regression
Regression Slope
0.933
Approximately 15 mm × 12 mm
Maximum of 10 measurements for each eye
Thermal line printer
RS232C
– 64 –
Percentage of mea-
surements out of
tolerable range
6 2.0%
6 3.0%
2 4.8%
14 2.6%
Coefficient of
Intercept Correlation
1.721 0.882