Currently I think it's -2.25, up from -0.25 about four years ago (2018) and +0.25 in ~2013 when I noticed I was short sighted.

My right eye at those same times was -4.25, ~-2, ~-2.

Feb 7, 9:45pm: What will my left eye's glasses SPH prescription be in 2025, if I get an eye test in that year? → What will my left eye's glasses (negative) SPH prescription be in 2025, if I get an eye test in that year?