Historical clue formulations

• Eyes: Sp. — 2020-10-04
• 44-Across, en español — 2013-12-23
• 13-Down, south of the border — 2012-02-21
• Iberian eyes — 2011-01-02
• Spanish eyes — 2009-11-18
• Sight-seers at the Prado? — 2009-11-06
• Spanish seers? — 2009-08-08
• Optometría concern — 2007-04-20
• Spanish eyes — 2006-07-30
• Spanish eyes — 2006-06-11
• Spanish eyes — 2006-02-26
• Spanish eyes — 2003-01-23
• Spanish eyes — 1998-06-07
• Spanish eyes — 1994-12-25