Visual field area on the Goldmann hemispheric perimeter surface. Correction of cartographic errors inherent in perimetry

Area of Science:

• Ophthalmology
• Visual Science
• Medical Imaging

Background:

• Goldmann perimetry is a standard method for charting visual fields.
• Conventional plotting methods can introduce cartographic distortion.
• This distortion leads to underestimation of the actual visual field area.

Purpose of the Study:

• To present mathematical methods for estimating the true visual field area.
• To correct for cartographic distortion in Goldmann perimeter measurements.
• To provide a basis for quantitative evaluation of visual field pathologies.

Main Methods:

• Development of mathematical formulas for area estimation.
• Application of correction factors to planimetric measurements.
• Analysis of visual field data from Goldmann hemispheric perimeter.

Main Results:

• Mathematical methods allow accurate estimation of true visual field area.
• Correction factors reduce errors from transposing curved surfaces to flat charts.
• The proposed methods address underestimation inherent in conventional plotting.

Conclusions:

• Accurate quantitative evaluation of visual field area is achievable.
• The methods facilitate more precise assessment of pathological changes.
• This approach enhances the diagnostic utility of Goldmann perimetry.