Specifications

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11. Specifications
Purpose Measurement of intraocular pressure of human eye
Type Non-contact type
Measurable range 0 to 60 mmHg (0 to 30 mmHg / 25 to 60 mmHg
changes automatically)
Measuring increment 1 mmHg
Operation distance Approximately 11 mm from front of nozzle
Measurement mode Fully automatic, automatic and manual modes
Measurement accuracy ISO standard: Percentage of measurements out of tol-
erable range must be under 5%.
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:
Observation range Approximately 15 mm × 12 mm
Memory Maximum of 10 measurements for each eye
Printer Thermal line printer
Data output format RS232C
Range
Number of
measured eyes
Number of mea-
surements out of
tolerable range
Percentage of mea-
surements out of
tolerable range
16mmHg>GAT≥7mmHg 298 6 2.0%
23mmHg>GAT>16mmHg 198 6 3.0%
GAT≥23mmHg 42 2 4.8%
Total 538 14 2.6%
Regression Slope
Regression
Intercept
Coefficient of
Correlation
TX-F
(Compared with Applana-
tion Tonometer)
0.933 1.721 0.882