OPTIKON KERATRON ONDA, Инструкция по установке и эксплуатации

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Keratron
™
Onda Installation and operating manual
OPTIKON 2000
Cod. 161401EN 7-30
2015-03-27
Rev.C
At the end, the measured aberrometry can be printed or transferred to the Scout
software, up to a maximum of 8 aberrometries per test, similarly to topo-
aberrometries and topographies (see sections from Figure 7-25 to Figure 7-28).
NOTE : As compared to topo-aberrometry, aberrometry only does not include
topographic or pupillometric measurements, that are therefore not transmitted to
the external PC. For aberrometry, it is not possible to calculate the Rx refraction at
the photopic pupil size.
7.8 NEAR ACCOMMODATION MEASUREMENTS [TOPO-
ABERROMETRY] AND [ABERROMETRY]
A button [Accom.] is present both in the Topo-aberrometry and Aberrometry
screens (9 in Figure 7-29). This button can be used to perform a "near"
accommodation, in addition to those described in sections §7.5 and §7.7 for "far
distances", that is at the maximum distance at which the eye being examined can
presumably accommodate (remote point or refractive error "defocus" = sphere-
equivalent, at VD=0, in diopters).
If you press [Accom.] (see Figure 7-52), the target "Stimulus" near focus displays
(asterisk in Figure 7-31), which can be set on any value ranging from -1D to -8D.
NOTE : for short-sighted patients, the distance of the remote point in metres is
inversely proportional to the "defocus" refractive error
, measured with “Auto Rx” or
set manually, in diopters.
The preset near focus is equivalent to placing in front of the eye, ideally corrected
with a sphere-equivalent that has the same "defocus" value shown in the lower left,
the fixation target at a infinite distance (for 0D), at 1 m (for -1D), 50 cm (for -2D), 33
cm (for -3D), 25 cm (for -4D), etc.
Figure 7-52: Topo-Aberrometry, setting for near accommodation.