## CVRL functions

The functions provided below result from our research into
human cone spectral sensitivities and luminous efficiency. They
provide a consistent set of colorimetric and photometric data that can be used to model and predict normal and
dichromatic colour vision for standard target sizes of 2-deg or 10-deg
in diameter. The data are provided either as ascii csv (comma separated values) files, as ascii xml (extensible markup language) files, as html tables—which appear in your browser window, or as dynamic graphical plots. Select the data format, the data stepsize and the data units and click the "Submit" button. For further details and references click . The data are provided to either 5 dp fpr logarithmic data or to 6 sf for linear data. Versions of some of these function are also provided to either 8 dp for logarithmic data or to 9 sf for linear data here. These versions are useful for avoiding rounding errors in calculations; they are used in particualr for calculating the linear transformation between the physiologically-relevant CIE LMS CMFs and the new CIE XYZ CMFs.

### 2-deg fundamentals based on the Stiles and Burch 10-deg CMFs adjusted to 2-deg

### 10-deg fundamentals based on the Stiles and Burch 10-deg CMFs

### 2-deg functions

### 10-deg functions

### 2-deg functions

### 10-deg functions

### Macular pigment

### Lens

Stockman and Sharpe's
template equation