Just installed a magnifying glass extension for Chrome on Windows. (I presume similar tools are available for other browsers/platforms.) This is just like a magnifying glass that moves with the cursor and magnifies a small section of the screen while you hover (the cursor I mean, not you personally 
). I’ve found it really useful for reading certain Vietnamese words.
The problem with Vietnamese is that it uses accent marks to denote BOTH certain alphabetic letters AND tones. These can occur in combination and certain combinations as in thể can be very difficult to read accurately unless you have a very large font size set. (Or if your eyesight is maybe not absolutely 100%.) But no problem at all using the magnifier.