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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 and Abbreviations
Term
Details
AM 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.
Eye diagram
Eye diagram of refractive status of the patient’s eye based on the AR median val-
ues (or the latest values when the median values have not been obtained) or the
subjective measured values when the subjective measurement has been per-
formed. There are eight eye diagram patterns.
SE (Spherical Equivalent)
value
The value that is 1/2 of the cylindrical error added to the spherical error. Calculated
for the AR median values (the latest values when the AR median values have not
been obtained) and contact lens conversion values.
Auto shot
This function automatically starts measurement as soon as alignment and focus-
ing become optimum.
Vertex distance (VD)
The distance between the corneal vertex to the posterior surface of spectacle
lenses.
Comments
Characters and symbols can be freely entered. Up to 24 characters per line with a
maximum of two lines can be input.
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 dis-
tance (VD) at 0 mm.
Trial lens data
Values that are converted automatically from the cylinder values so that the sphere
values for the trial lens become smaller based on the AR median values (the latest
values when the median values have not been obtained).
Fogging
Blurs the patient’s view to prevent focus in order to eliminate accommodation.
Quick measurement mode
For measurement of children or patients who cannot fixate their eyes, the auto
shot function may not work causing measurement failure. In this mode, the criteria
required for target is relaxed to facilitate measurement.
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.
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” indicates
erroneous data. Measured data obtained in cataract measurement mode is
marked with the preceding “*” symbol.
