It's important to keep your blood sugar within reasonable range--diabetes can cause pretty severe vision problems. Also, consider getting a pair of fixed-focus

It's important to keep your blood sugar within reasonable range--diabetes can cause pretty severe vision problems. Also, consider getting a pair of fixed-focus "computer" glasses. They won't "preserve" your eyesight, but it's kind of a one-time level-up to let you use those tiny fonts a few more years.