George Mason was the principal author of the Virginia Declaration of Rights. The Declaration was adopted unanimously by the Fifth Virginia Convention at Williamsburg, Virginia on June 12, 1776 as a separate document from the Constitution of Virginia which was later adopted on June 29, 1776.
Symptoms Fluctuate. It is very common for dry eye symptoms (especially blurred vision) to wax and wane throughout the day. Symptoms can even change from blink-to-blink. Dry eye disease which is predominately due to insufficient tears tends to worsen throughout the day with symptoms worse at night.
Dry eyes can cause the sudden onset of focus problems as you've described, and dry eyes can be caused by things like diabetes and hormone changes. A related symptom can be suddenly dry skin. By the way, dry eye can be made worse by excessive use of eye drops, especially if the eye drops contain preservatives.