Swap Contact Lenses Lost A Contact Lens, Swapped Eyes, Vision Worse! Why Not Any Better?

Lost a contact lens, swapped eyes, vision worse! Why not any better? - swap contact lenses

I lost a contact lens today. My recipe -2.25 and -3, and unfortunately was -3 lens, which I lost. Instead, run with one eye 3 diopters undercorrected, I decided the lens of -2 in contact with the eyes of -3 place.

It seems not much help, can, in fact, in a presentation, even if not read about 5 feet from the screen, a lot of text. I do not understand why, when my eye is lower than -1 diopter undercorrected.