[Perimetric probability maps for short wavelength automated perimetry].
OBJECTIVE
To develop a statistical visual field analysis model (ANESTCAV) suitable for short-wavelength automated perimetry (SWAP), from the probability maps (PM).


METHODS
128 eyes of 128 subjects without ophthalmic pathology were considered. A SWAP test was performed with a modified Humphrey visual field analyzer. To determine the PM (1) we developed a <<Standard Visual Field>> (CVNR) corrected for age, (2) we assessed the differences between the CVNR and the visual field of each subject, and (3) from the distribution of the deviations, we determined the confident interval with 4 levels of statistical signification (95, 98, 99 and 99.5%) at each point of the visual field.


RESULTS
A regression analysis calculates the <<standard value>> (VNR) corrected for age at each point of the visual field. The 74 VNR of the visual field constitutes the CVNR corrected for age. Each point has a confident interval for each level of signification which determines the range and probability of value to be normal.


CONCLUSIONS
The development of ANESTCAV obtained a precise instrument for perimetric analysis which establishes the ranges of normal results in these exploratory procedures.
Polo Llorens V
Servicio de Oftalmología, Hospital Miguel Servet, Zaragoza, España.
Larrosa Poves JM
Pinilla Lozano I
Pablo Júlvez L
Honrubia López FM
D000328:Adult; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D012044:Regression Analysis; D012680:Sensitivity and Specificity; D058609:Visual Field Tests / Q000379:methods*; D014794:Visual Fields