Zeiss HUMPHREY 720i, Руководство пользователя

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CUSTOM TESTING 10-5
REV. B 02/03 PN 51680-1 HUMPHREY FIELD ANALYZER
II -
i
series
The following is a graph to help explain (X, Y) coordinate systems. For the point shown, X = 5
and Y = -3. (X, Y) is (5, -3).
Remember, the Custom test pattern you are designing must be for the right eye. Therefore,
temporal points will be plotted to the right (positive “X” values) and nasal test points will
be to the left (negative “X” values).
Field Size
This lets the user choose one of three field sizes for testing: Central 10 degrees, Central 30
degrees, or Full 90 degrees. Each field size is independent of the other two. They may not be
combined.
The field size may not be changed once set.
Point Spacing
This option allows the user to determine the spacing in degrees between points on the test
field. This point spacing applies to the separation between each point in a Grid as well as the
separation of a Single Point from another Single Point (or Grid point). The point spacing
options for each Field Size are indicated below:
Central 10 Central 30 Full 90
1˚ * 2˚ * 6˚ *
2˚ 4˚ 8˚
4˚ 6˚ 10˚
6˚ 8˚ 12˚
Note: The default point spacings are marked with asterisks (*).
-7 -6 -5 -4 -3 -2 -1 1 2 3 4 5 6 7
1
2
3
-1
-2
-3
0
○ ○ ○ ○ ○ ○ ○ ○ ○
○
○
○○○
(5, -3)
Y
X
(nasal) (temporal)
blind
spot
Figure 10.1: An Example of the X, Y Coordinate System for the Right Eye
10.htp 3/14/03, 2:43 PM 5