While there are a number of factors that can impact the health of your eyes, being exposed to too many small, poorly readable text fonts is one of the most common causes of eye strain. This happens when you regularly work with fonts on your computer or phone that are much smaller than those displayed in print. By reducing the size of font you choose to use, you’re freeing up more eye tracking space for all the information you need to process.
In general, always opt for larger text sizes over smaller ones, even if it means paying a little extra for it. And try to avoid using any typeface with less than six point size. For short-form reading, such as emails and tweets, you can also try switching from regular to bold text sizes.
By choosing a small font size, you can make your text look more readable. This is helpful especially if you have poor vision or are trying to read something in a low light setting. Smaller fonts also help with legibility when there are lots of other text on the page.