Comparison of static automated perimetry and semi-automated kinetic perimetry in patients with bilateral visible optic nerve head drusen.
OBJECTIVE
Until now there has been no standardized, systemic approach to diagnostics in patients with optic nerve head drusen (ONHD). This study compares visual field (VF) results obtained with static automated perimetry (SAP) and semi-automated kinetic perimetry (SKP) in patients with bilateral visible ONHD.


METHODS
Visual fields in 26 eyes (13 patients) with ONHD were obtained by Humphrey Field Analyser II (SAP) and Octopus 101 (SKP) equipment and classified by three masked observers. Pairs of VFs were considered equivalent if the descriptions given by both methods matched. Individual reaction time (RT) was assessed during SKP. Fifteen healthy volunteers were examined as control material.


RESULTS
Visual field pairs matched in 19 eyes (three normal VFs, 16 arcuate defects). In the remaining eight eyes SKP provided more information in concentric constriction of the VF (two eyes) and SAP provided more information on paracentral scotomas (five eyes). Sensitivity was 69% for SKP, 80% for SAP and 88% for both methods together. Mean RT assessed using SKP amounted to 909 ms in eyes with ONHD and 568 ms in normal subjects (p < 0.0003). The median examination duration was 13 mins with SKP and 11 mins with SAP (p = 0.05) in eyes with ONHD, and 8 mins in control eyes (p < 0.0001).


CONCLUSIONS
In clinical practice it is necessary to perform both SAP and SKP in patients with ONHD because the VF defects are diverse. In SKP, RT is prolonged in eyes with ONHD compared with normal eyes and SKP takes longer than SAP in ONHD eyes.
Nowomiejska
Katarzyna
K
Department of Ophthalmology, Medical University, Lublin, Poland. katarzynanowomiejska@mailcity.com
Rejdak
Robert
R
Zagorski
Zbigniew
Z
Zarnowski
Tomasz
T
D000328:Adult; D000368:Aged; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D015594:Optic Disk Drusen / Q000503:physiopathology*; D011446:Prospective Studies; D012607:Scotoma / Q000503:physiopathology*; D012680:Sensitivity and Specificity; D014065:Tonometry, Ocular; D014792:Visual Acuity; D058609:Visual Field Tests / Q000295:instrumentation*; D014794:Visual Fields / Q000502:physiology*; D055815:Young Adult