hi i dont have a trigon,
ive a juwel vision with the bow front,a lot off people say it makes their eyes go funny,but im use to it so it dont bother me.
i started off with a biorb 30ltr ,
it did seem to make the fish look distorted,my uncle has a trigon 190 its not like looking into a biorb.
it wont make neons look like sharks.
The bow front Juwel Vision certainly does not distort at all. But I do believe (from what I've read members saying wtih Trigons) the large 350 Trigon distorts a lot but the smaller 190 isn't too bad.