Humphrey Field Analyzer II-
i
series User Manual
2660021145640 A
STATPAC Analysis & Printing
7-21
Grayscale Symbols
The grayscale representation of the patient’s visual field provides an immediate idea of the size and
depth of any field defects present. Each variation of the pattern corresponds to a 5 dB change in
sensitivity. The comparative scale that is shown below in
displays the ten (10) grayscale
patterns and relates them to decibels and apostilbs. An explanation of the relationship between
these units of measurement can be found in
along with Goldmann conversion tables.
Note: SWAP printouts use the same relationship between grayscale symbol and decibel values as
white-on-white testing. The grayscale will look significantly darker with SWAP testing in most cases.
This is because SWAP testing normally generates lower threshold sensitivity values than does
white-on-white testing. Note that the maximum (0 dB) stimulus in SWAP testing is 6 foot-lamberts,
not 10,000 apostilbs.
Table 7.3 The Grayscale Shades Found on HFA II-i Printouts and Their Numerical
Equivalents in Apostilbs (ASB) and Decibels (dB).
Содержание Humphrey II-i series
Страница 1: ...User Manual Humphrey Field Analyzer II i series System Software Version 5 1...
Страница 8: ...Humphrey Field Analyzer II i series User Manual 2660021145640 A vi...
Страница 40: ...Introduction Instrument Setup Humphrey Field Analyzer II i series User Manual 2660021145640 A 1 32...
Страница 74: ...General Operation Humphrey Field Analyzer II i series User Manual 2660021145640 A 2 34...
Страница 130: ...Testing Humphrey Field Analyzer II i series User Manual 2660021145640 A 5 20...
Страница 158: ...STATPAC Analysis Printing Humphrey Field Analyzer II i series User Manual 2660021145640 A 7 22...
Страница 338: ...Kinetic Testing Humphrey Field Analyzer II i series User Manual 2660021145640 A 13 62...
Страница 412: ...Care and Cleaning Humphrey Field Analyzer II i series User Manual 2660021145640 A 15 14...
Страница 416: ...Product Specifications Humphrey Field Analyzer II i series User Manual 2660021145640 A A 4...
Страница 420: ...Product Features Humphrey Field Analyzer II i series User Manual 2660021145640 A B 4...
Страница 428: ...Icon Glossary Humphrey Field Analyzer II i series User Manual 2660021145640 A D 2...
Страница 540: ...Installing Licensing HFA II i Software Humphrey Field Analyzer II i series User Manual 2660021145640 A J 10...
Страница 558: ...Reference to Older Test Strategies Humphrey Field Analyzer II i series User Manual 2660021145640 A L 10...
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