Historical clue formulations

• Test taken at the 24-Down — 2026-01-19
• It may involve dilation — 2020-01-23
• Something you might get two 20s for? — 2015-03-15
• Driver's license requirement — 2013-10-12
• Test with letters — 2013-02-14
• It often involves a Snellen chart — 2011-10-02
• It involves reading letters out loud — 2008-11-04
• Task to focus on — 2007-02-10