Topcon KR-1W, Instruction Manual

Page: 174 / 188

172
TERMINOLOGY
TERMINOLOGY
DESCRIPTION OF TERMS
Related information of terms can be found in the cited pages.
0 - 9
Term Description Page
2nd Astig A type of high order aberration. Astigmatism. Shows
aberration of the 4th order of Zernike polynominal equa-
tion (-2 and 2 terms). 69,70,
125
A - Z
Term Description Page
Aberration Astigmatism.
Absolute A type of color code scale of analysis result.
For KR-1W, three types of scales, absolute/adjustable/
normalized are available. "Absolute" is a relative scale
having constant color code center value and variable dis-
play step. 130
Adjustable A type of color code scale of analysis result.
For KR-1W, three types of scales, absolute/adjustable/
normalized are available.
"Adjustable" is a relative scale having variable color code
center value and variable display step. 130
Alignment Mark Range of alignment measurement. Beyond the range,
reliability of measurement is low. 39
Analysis center Analysis center used in analysis.
If pupil is detected, the pupil center is used. If pupil is not
detected, mechanical center (cornea vertex) is used for
analysis. 65,88
Angle Scale Overlay KR-1W can display angles, horizontal direction as 0°, in
the aberration map. 79,128,
130,132
Astig (4mm) Low order astigmatism (with 4mm analysis diameter).
Also called corneal astigmatic power (corneal system) or
cylindrical refractive power (ocular system).
73
Astigmatism map Aberration map using a low order astigmatism map. 69
Auto mode Alignment measurement mode. In KR-1W, three types of
Full Auto (auto alignment) mode, Auto Tracking mode
and Manual mode are available. 34,39,
108,112
Auto print After finishing measurement, Ref/Kerato measurement
values are printed out from internal printer. 41,116