Too little lightEye muscle work, too, because the eye is open even wider.Caused the fatigue of gaze fixation/laxativesHandling equipment for easy error
Too little light eye muscles must work too much, forcing pupils to open wider the fatigue from staring / gaze prolonged handling equipment error-prone.
Too little light.The muscles work because too much to force the pupils open up.The fatigue gaze / stare for a long time.The handling equipment mistake easily.