79
OPERATING PROCEDURE
Chart Presentation
2
ࠉ
: Switches the chart contrast in the order of 25%, 12.5%, 6%, and 100% (normal contrast).
The contrast function makes it possible to test the visual acuity under low-contrast condi-
tions (25%, 12.5%, 6%). This function can evaluate the visual function according to contrast
sensitivity, which is not measured in the standard test, and can observe changes with time.
is shown to the right of the displayed chart on the chart window when the contrast is
25%,
is shown when the contrast is 12.5%, and
is shown when the contrast is
6%.
ࠉ
: Turns the glare lamp on at high luminance when the low illumination function is enabled. (Only
SSC-350MCG and SSC-370MCG/MG)
Glare lamp ON
Contrast 25%
Low-light illumination
• The low illumination, glare lamp, and contrast functions are available at any time during
refraction.
• The low illumination and contrast functions cannot be used at the same time.
When the SSC-330U (equipped with the optional glare lamp) is con-
nected, pressing the left side switch of the control box displays the
glare lamp buttons.
[Glare]:Turns on or off the glare lamp.
[
], [
]:Controls the lamp intensity.
is shown to the right of the displayed chart on the chart
window when the glare lamp is turned on.
• The glare lamp can be lighted up at all times.
When the SSC-350M, SSC-350MCG, or SSC-330U equipped with optional glare lamp is connected,
there is a special mode to test the visual acuity using the low illumination, glare lamp, or contrast func-
tion. For the SC-1700 PolaM, SC-2000M, SC-1600M, and SC-1600 PolaM only the test using the con-
trast function can be performed. The mode allows the measured data to be stored separately from
normal measurement data.
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Содержание RT-5100
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Страница 46: ...28 BEFORE USE Getting Started and Exiting 161221687130 承認済 Uncontrolled copy when printed ...
Страница 226: ...208 TEST METHOD Visual Acuity Test by ETDRS chart 161221687130 承認済 Uncontrolled copy when printed ...
Страница 274: ...256 MAINTENANCE List of Replacement Parts 161221687130 承認済 Uncontrolled copy when printed ...
Страница 302: ...284 EMC ELECTROMAGNETIC COMPATIBILITY 161221687130 承認済 Uncontrolled copy when printed ...