Measuring Screen Distance: Taped To Desk Method
Bag of tricks, kittehz.
Active Focus With Double Vision? | Endmyopia Q&A
This isn't like checking out twins - double vision of the sort you don't want.
Double Vision / Transient Astigmatism: Is It Normal?
Double vision / ghosting / astigmatism, not all the same.
Looking Out Of Window: Enough For A Screen Break?
Letting them eyeballs out of the screen cage.
Print Pushing: Does It Actually Work?
Not all that shines, is gold.
Can My Child Wear Differential Glasses ONLY?
Kids eyesight, a tricky topic.