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 # RelativeVisualPerformanceCIE1452002 

 Last update: 17.07.2025 

## Description

Calculates the relative visual performance according to the CIE 145:2002 norm as a function of the background luminance, the target luminance and the target size. Returns a value between 0 and 1.

## Syntax

*object*.RelativeVisualPerformanceCIE1452002(short nAge, double dLuminanceBackground, double dLuminanceTarget, double dTargetSize) As Double

- *object*: Virtual Human Vision Lab object
- *nAge*: observer age (input)
- *dLuminanceBackground*: background luminance in cd/m² as double (input)
- *dLuminanceTarget*: target luminance in cd/m² (input)
- *dTargetSize*: target size in inches (input)