If, like many of us, your birthday signifies not only another year of
wiseness, but an increase in eye-squinting when reading, you might want
to check out the Ease of Use settings on your Lumia. Go to Settings
> System > Ease of Access and choose to; activate high contrast
for better clarity, increase text size (in a number of areas) and/or
turn on the Screen magnifier, which means you can double-tap to zoom
into and pan around things.