scholarly journals The ability of frequency doubling technology (FDT) perimetry to predict the onset of glaucomatous visual field loss for standard automated perimetry (SAP)

2002 ◽  
Vol 2 (10) ◽  
pp. 100-100
Author(s):  
C. A. Johnson ◽  
G. Takahashi ◽  
S. Demirel
Keyword(s):  
Visual Field ◽  
Frequency Doubling ◽  
Visual Field Loss ◽  
Automated Perimetry ◽  
Standard Automated Perimetry ◽  
Frequency Doubling Technology

scholarly journals Alterations Induced by Bangerter Filters on the Visual Field: A Frequency Doubling Technology and Standard Automated Perimetry Study

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Costantino Schiavi ◽  
Filippo Tassi ◽  
Alessandro Finzi ◽  
Mauro Cellini
Keyword(s):  
Visual Field ◽  
Frequency Doubling ◽  
Control Group ◽  
Automated Perimetry ◽  
Standard Automated Perimetry ◽  
Parvocellular Pathway ◽  
Anisometropic Amblyopia ◽  
Frequency Doubling Technology ◽  
Normal Adults

Purpose. To investigate the effects of Bangerter filters on the visual field in healthy and in amblyopic patients.Materials and Methods. Fifteen normal adults and fifteen anisometropic amblyopia patients were analysed with standard automated perimetry (SAP) and frequency doubling technology (FDT) at baseline and with filters 0.8 and 0.1.Results. With 0.1 filter in SAP there was an increase of MD compared with controls (−10.24 ± 1.09 dB) in either the amblyopic (−11.34 ± 2.06 dB;P<0.050) or sound eyes (−11.34 ± 1.66 dB;P<0.030). With filters 0.8 the PSD was increased in the amblyopic eyes (2.09 ± 0.70 dB;P<0.007) and in the sound eyes (1.92 ± 0.29 dB;P<0.004) compared with controls. The FDT-PSD values in the control group were increased with the interposition of the filters compared to baseline (0.8;P<0.0004and 0.1;P<0.0010). We did not find significant differences of the baseline PSD between amblyopic eyes (3.80 ± 2.21 dB) and the sound eyes (4.33 ± 1.31 dB) and when comparing the filters 0.8 (4.55 ± 1.50 versus 4.53 ± 1.76 dB) and 0.1 (4.66 ± 1.80 versus 5.10 ± 2.04 dB).Conclusions. The use of Bangerter filters leads to a reduction of the functionality of the magno- and parvocellular pathway.

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