Yes, but a dimly lit room will cause more exertion on the pupillary muscles anyway, because the flux of light is way too low for all types of focused activity l

Yes, but a dimly lit room will cause more exertion on the pupillary muscles anyway, because the flux of light is way too low for all types of focused activity like reading. Both undivided attention and the flux of light have a significant influence on the pupillary state of the eyes. [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634867/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4634867/