I have just found when in my browser with this site open if I click the three vertical dots to the top right of the screen a menu appears. Mid way down this menu it says ZOOM with a setting next to it mine says 90%. Next to this figure is a minus and plus sign. Clicking on these will increase the page size and make the text bigger. Hope this helps.
If this doesn't help, please see your optician as a matter of urgency , please remember I am a fully paid up member of the Technophobic Society!
"I would rather have a russet coated Captain who knows what he fights for and loves what he knows. Than he who calls himself a gentleman, and is but little else." Oliver Cromwell