Keratron
™
Onda Installation and operating manual
OPTIKON 2000
Cod. 161401EN
7-28
2015-03-27
Rev.C
7.7
ABERROMETRY [ABERROMETRY]
By selecting the [Aberrometry] in the initial screen in Figure 7-1, it possible to
measure the aberrometry only, along with the refraction associated to it, without
using the corneal topography.
As compared to Topo-Aberrometry (see sections §7.5 and §7.6), this function
prevents the patient from suddenly switching the cone visible light on and enables
the operator to process and transfer the topography and pupillometry in a shorter
amount of time.
The
acquisition of images
(from the wavefront sensor only) for aberrometry is
identical to the procedure used for topo-aberrometry, described in section §7.5. The
controls and options displayed on the screen are the same. The only difference lies
in the fact that it is not necessary to select the pair of photocells for aberrometry,
because the distance is always “Far” (see section (5) in Figure 7-29 with Figure
7-49), which represents the most comfortable distance for the patient.
Figure 7-49: Aberrometry, acquisition of the image.
In addition, the aberrometry acquisition is enabled (both for the initiation with the
joystick button and for the acceptance at the end of the "fogging" phase) for a range
of distances from the eye that is wider as compared to the one used for topo-
aberrometry. This range also comprises the distances represented by the up/down
arrows, under "OK", that display on the right section of the screen; for example in
Figure 7-50 and Figure 7-51.
