In other reports about the tragedy, witnesses pointed out that Henochowicz was standing away from the stone throwing protestors. And that the young girl seems to have been the target of several cannnisters, directly aimed at her, a real crossfire. While Issacharoff and Bar-On provide valuable info about the questionable way the canisters were dispersed, by shooting directly which is most probably against the regulations, they can't say anything specific about how Henochowicz was injured. Couldn't they find anyone who was standing closer and who could add the missing informations?
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Eyewitness account: How Emily lost an eye