Nidek Medical ARK-1S, Руководство оператора

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SPECIFICATIONS AND TECHNICAL INFORMATION: Glossary and Abbreviations
5.2 Glossary and Abbreviations

The following terms and abbreviations are used in the device and operator's manual.
O
Glossary
Term Details
AI mode For AR measurement, measurement automatically finishes after the specified
number of measurements if the data is stable without variations.
If unstable data is included, two additional measurements are taken and then
measurement finishes.
AR median values The Spherical Equivalent (SE) value is obtained from respective data. The
median SE value is obtained when the values are arranged in order by the
computer. The SPH median value is calculated by the following equation
based on the obtained median values.
SPH median value = (Median SE value) – (Median CYL value / 2)
The CYL and AXIS median values are taken to be the median values when
arranged in order. If the measured data is two values or less, then the latest
value is selected.
Auto shot This function automatically starts measurement as soon as alignment and
focusing become optimum.
Auto tracking, auto focusing A function that automatically controls up, down, right, and left movements for
alignment and forward and backward movements for focusing.
Cataract measurement mode If abnormal optical reflection is detected or the auto shot function does not
work, measurement criteria is changed automatically so that even cataract or
abnormal eyes can be measured.
Comments Characters and symbols can be freely entered. Up to 24 characters per line
with a maximum of two lines can be input.
Confidence index The confidence index is displayed in six levels (9, 8, 7, 6, 5 or E). The lower
the confidence index, the larger the influence of irregular astigmatism. E is
erroneous data.
Measured data obtained in cataract measurement mode is marked with the
preceding “
*
” symbol.
Contact lens conversion
value The value from which the AR median values (the latest values when the
median values have not been obtained) are converted into CL values, with
the vertex distance (VD) at 0 mm.
CS Abbreviation of Corneal Size
Fogging Blurs the patient’s view to prevent focus in order to eliminate accommodation.
KM median values The median value of measurements which are arranged in order in the com-
puter. If the measured data is two values or less, then the latest value is
selected.
Limit indicator When the measuring unit moves out of the working range of auto tracking,
the limit indicator (arrows) is displayed on the screen.
Minimum pupil diameter
mark
Indicates the minimum measurable pupil size.
Near PD PD for a near working distance of 40 cm (factory setting). Used for prescrip-
tions of reading glasses or bifocals.
Near working distance Distance when viewing the near target through reading glasses or bifocal
glasses.
PD Abbreviation of Pupillary Distance