First: Change the background.
Step 1. Take a picture of something black. Heck, just place your iPhone or iPad on the table, and take the black picture. Unfortunately, Apple has not added a basic, plain black background as an option, so I just did this.
Step 5: Select the Black photo and SET YOUR WALLPAPER ONLY. You can keep your Lock Screen to your favorite picture.
But wait, there's more.
Did you notice the iOS 7 platform gave you the thinnest font ever? Well….
Go to Settings….
and Choose BOLD TEXT
When your device comes to life, the type face will be just a little bit thicker, helping (my older) eyes see just a little bit more easily.
Now, doesn't that look much better?