There are also documented effects of your camera quality, and even where your camera is placed (as you tend to look at your screen during a call so your gaze is always relative to it).
probably not very relevant in a zoom meeting but there are people hypersensitive to the eye movements of someone reading from a teleprompter as well! When I figure someone is reading from a script with their eyes moving, it really affects my focus for some reason. Here is someone trying to find the ideal setup to prevent it: https://www.youtube.com/watch?v=8LkRMtWfhn4