describe how light tunnel makes light more uniform
reading jean-yves work on c. elegans phototoxicity
this lead me to read the chapter in a. diaspro "nanoscopy and multidimensional ..." which gives some interesting facts about phototoxicity and an overview of how the confocal was developed (and which groups contributed)
then i also found bernhard kausler's thesis and a 2012 paper. he is the guy who wrote ilastik. it certainly looks interesting for cell tracking