288 / 374
SOCT User Manual Version 10.0 rev. A
Total Quality Factor
Total Quality Factor – a summary factor that determines whether the operator can trust the
measurement. The total quality factor is based on the values of all individual factors: QI, CI,
AAA, APA
Correlation Index – information about tomograms correlation in the measurements
OK [Accepted] Not correlated >87 %
! [Borderline] Unreliable, 86%> to >70%
NG [Not correlated] Not correlated to <69%
Analyzed Area - information about the relation of the scanned area in ideal condition to the
recognized area in the anterior and posterior. It is expressed in %
A AA – [Anterior Analyzed Area] –
OK [Accepted] >85 %
! [Borderline] 84> to >65%
NG [Not correlated] Not correlated to <64%
P AA – [Posterior Analyzed Area]
OK [Accepted] >63 %
! [Borderline] 63> to >41%
NG [Not correlated] Not correlated to <40%
Artifact– this warning appears when on 3 consecutive scans the system detects places where
the recognition algorithm has uncertainty sections. This problem makes it possible to to detect
artefacts relate to the close Eyelid, ghost signal from the iris, lack of signal due to long
eyelashes or decreasing the signal due opacity in the cornea.
Results for the Topography scan are not displayed for scans with poor quality in which an
algorithm failed. In this case, the scan should be repeated.
For clinical use, it is recommended for the user to take at least three corneal power scans and
calculate mean corneal power for further measurement variability reduction.
Result review
[Single] view
The overview display is a compilation of several evaluation representations which gives a quick
overview of the anterior eye segment being measured.
To Next Page
Loading...
