6 Device Description
Instruction Manual Pentacam® AXL (G/70100/EN 1121 Rev04) 17 / 85
6.2 How the Pentacam® AXL works
While rotating around the eye, the Pentacam® AXL captures Scheimpflug
images of the anterior eye segment through varying axes. The
Scheimpflug images created during an examination are transmitted to
the connected PC.
The axial length of the eye is measured and displayed by interferometry.
Scheimpflug images can be captured at two seconds.
Up to 138,000 genuine height values are measured and analysed from the
Scheimpflug images.
The Scheimpflug images are the basis for the height data which are used
to calculate a mathematical 3D model of the anterior eye segment. At
same time any eye movements are recorded and taken into account.
A quality specification (QS) lets you gauge the quality of the
measurement taken.
The mathematical 3D model, corrected for eye movements, provides the
basis for all subsequent analysis.
The topography of the front and rear surfaces of the cornea and the
pachymetry are calculated and displayed from limbus to limbus for the
entire surface of the cornea.
An analysis of the anterior chamber provides the basis for calculating the
chamber angle, chamber volume and chamber depth.
Densitometry of the cornea and lens automatically produces quantified
values.
Colour images displayed on the screen show the results of the
measurement.
A rotatable 3D model displays the front and rear surfaces of the cornea,
the iris and the lens.
Attention
OCULUS Optikgeräte GmbH shall not be liable in any form for further use
of the data recorded by a Pentacam® AXL and for the evaluations it has
calculated.
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