This value set includes codes based on the following rules:

• Include these codes as defined in http://dicom.nema.org/resources/ontology/DCM

  Code	Display	Definition
  111627	Scotopic light	Lighting condition approximately 0.04 lux.
  111628	Mesopic light	Lighting condition approximately 4 lux.
  111629	Photopic light	Lighting condition approximately 40 lux.
  111630	Dynamic light	Acquisition preceded by intense light.
  111625	Diffuse direct illumination	A broad or "soft" light supplied from a single source.

• Include these codes as defined in http://snomed.info/sct

  Code	Display
  410463003	Broad tangential direct illumination
  410461001	Dual diffuse direct illumination
  410465005	Indirect retroillumination from the iris
  410466006	Indirect retroillumination from the retina
  410462008	Fine slit beam direct illumination
  410464009	Indirect sclerotic scatter illumination
  410467002	Indirect iris transillumination