Specifications Section 6
6 - 2 Doc # 0300-A-1901-3D
A-SCAN SYSTEM PERFORMANCE
Examination Modes Automatic Capture
Normal Cataract
Dense Cataract
Aphakic
Pseudophakic
Manual
Display Scale Electronic Markers at 1.0 mm
Intervals
Statistical Analysis AXL Average
AXL Standard Deviation
Up to Five (5) Readings
IOL Programs Binkhorst
Regression-II
Theoretic-T
Holladay
Hoffer-Q
Haigis (optional)
IOL Calculations Lens Power vs. Refraction
Displayed in ½ Diopter Steps
Selectable Refractions
Customizable IOL Constants
Measurement Limits
AXL
Lens
ACD
(in Automatic Mode @1550)
18 - 46 mm
2-6 mm
2-6 mm
Measurement Accuracy
Electronic
Clinical
0.0484 mm
0.1 mm
Amplifier Low Noise
Variable Gain
Nominal Gain = 60 dB
Index of Refraction 1.3375 (see note 1)
Notes:
1. The Index of Refraction used by the
P
ACSCAN™ for conversion of keratometer
readings is 1.3375. When using a
keratometer with a different index of
refraction, K readings specified in
millimeters must be first manually converted
to Diopters and then entered for the patient
data. Consult the keratometer manufacturer
for specific details.
PACHYMETER SYSTEM PERFORMANCE
Measurement Modes Single Reading / One Point
Multiple Readings / One
Point
Single Reading / Multiple
Points
Multiple Readings / Multiple
Points
Statistical Analysis Average of 256 Individual
Measures for Each Reading
Standard Deviation for Each
Reading
Average of Up to 5 Readings
for Each Point
Standard Deviation of Up to 5
Readings for Each Point
Average Across All Points
Standard Deviation Across
All Points
Customizable
Parameters
Corneal Velocity
Measurement Bias
Measurement Limits (Tissue Velocity @ 1636)
0.30 – 1.00 mm
Measurement Accuracy
±5 microns
Measurement Precision
±1 micron
Amplifier Low Noise
Automatic Gain Control
Maximum Gain = 60 dB
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