Topcon MC-4S, User Manual

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CHART FUNCTIONS UNIQUE TO THE MC-4S
ACTIVE CHART
In the MC-4S, it is possible to use "Active chart" for testing/checking by making use of the characteristics
of the built-in liquid crystal visual acuity chart.
Prism simulation function
With this function, you can move the target indicated to the right/left eyes in the phoria test. This func-
tion is useful to explain the eye condition to the patient or check the patient's eye after the test.
Relevant chart
The following charts are applicable to this function:
Executing "Prism simulation"
1
Select the chart applicable to "Prism simulation" from the chart page.
2
Perform the phoria measurement according to normal procedure.
3
Touch the [Simulate] button among the function buttons at the bottom of the screen on the KB-50S.
4
The prism lens, which is set on the measuring head of the CV-5000, is temporarily canceled. As
shown below, the chart is converted so that the targets may be indicated at the right and left eye
target positions and then the chart is displayed on the MC-4S.
The prism measurement value is rounded to the 0.2 prism step value.
Example: Cross chart
Before simulation After simulation