If you've noticed that it's been getting harder to read websites lately, you aren't alone. The trend in modern website design has gone in the direction of smaller font sizes and reduced contrast between the text color and the background.
Mike is also vision impaired and likes to use his tablet as a phone, but often the high-resolution screen makes it hard to read. Leo suggests going into the accessibility options in Android to change the font size. However, a poorly programmed app won't support it. So if it doesn't, then he should try a different app. There's also magification in the settings he could use as well.