AutoPeri(NM)
.pdf
Generalised depression with ‘hidden’ localised scotoma
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90 |
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90 |
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© Thomas R |
Pattern deviation plot: scotoma revealed after adjusting for generalised depression
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180° |
0° |
40 dB
30
20
10
0 |
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90 |
60 |
30 |
0 |
30 |
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90 |
© Thomas R
Zone 5: pattern deviation
•Reveals focal defects after adjusting for overall depression
(or elevation) of the hill of vision
•Confirms a scotoma
© Thomas R
Examples of total and pattern deviation plots in different situations
Normal ‘hill’ of vision
© Thomas R
‘Normal’ hill of vision with localised scotoma
180° |
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0° |
40 dB |
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30 |
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20 |
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10 |
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0 |
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90 |
30 |
60 |
© Thomas R
Generalised depression with
‘hidden’ localised scotoma
© Thomas R
Generalised depression
© Thomas R
© Thomas R
Global indices
•All the information from all the points tested is reduced to single numbers
MD |
–2.18 dB |
PSD |
4.63 dB; p < 1% |
SF |
1.24 dB |
CPSD |
4.44 dB; p < 0.5% |
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MD, mean deviation; PSD, pattern standard deviation; SF, short-term fluctuation; CPSD, corrected PSD.
© Thomas R