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10.4
10.4
10.4
10.4
Near Addition Test using Cross Grid
Purpose: Correct Near Addition according to Accommodation, using Cross Grid.
Chart: Near Vison Chart (Cross Grid)
Auxiliary Lens: Fixed Cross Cylinder Lens
Target: Make the clarity and thickness of horizontal/vertical lines equally, similar with Far Vision
Cross Grid Test.
Way of Test
1. On Special Chart clause of touch screen, press [N ADD #] button to drop the
Near Vision Cross Grid Chart at a place of about 40cm or press [TEST] button to
choose [NEAR ADD].
2. Press [R] [BIN] [L] to choose the field for test.
3. Change the ADD value until the thickness or clarity of horizontal or vertical line
becomes equal.
4. Record the estimated value of left, right, and both eyes.
▶
When the vertical line is seen clearly, turn the dial clockwise (- direction.)
▶
When the horizontal line is seen clearly, turn the dial counterclockwise (+ direction.)
[Figure 10-4] Addition Test Using Cross Grid
