Taking good care of your lenses is taking good care of your eyes. It’s important to keep an accurate schedule, so you can dispose of your lenses when you need to.
If you wake up with crusts on your lashes, red and sore or itchy eyes, don’t wear your lenses. If you have an infection and you wear your lenses anyway, be prepared to throw that pair away as it is now carrying bacteria. This is why it’s important to keep a pair of spectacles as a backup.