„Veiling glare is stray light in lenses and optical systems caused by reflections between surfaces of lens elements and the inside barrel of the lens. It is a strong predictor of lens flare— image fogging (loss of shadow detail and color) as well as “ghost” images— that can degrade image quality in the presence of bright light sources in or near the field of view. It occurs in every optical system, including the human eye.” (http://www.imatest.com/docs/veilingglare/)

„Lens flare is the light scattered in lens systems through generally unwanted image formation mechanisms, such as internal reflection and scattering from material inhomogeneities in the lens.” (https://en.wikipedia.org/wiki/Lens_flare)