You can buy cheap 3M or other brand bi-focal or tri-focal glasses with the reading part on the top, bottom, or both. It's easier to tilt your head down and focus on the sights then raise your head a bit to see the target.
My far sight isn't bad, but I usually have to try to get a sight picture then point aim at the nearer targets. I have the Trijicon HD Pros on all of my Glocks and regular Trijicons or Meprolights on my Kahrs. I need to replace my 2010 P380's sights some day and will look for better sights, but for the present they still act like night lights on my bedside table.
I did put the TFX Pros on my wife's Glock 43... Fiber Optic/Tritium sights... good day and night. A wider rear sight aperture seems to work a little better than a small one.
USAF Retired '88, NRA Life Member. Wife USAF Retired '96
Avatar: Wynn re-enlists his wife Desiree, circa 1988 Loring AFB, ME. 42nd BMW, Heavy (SAC) B-52G's
Frédéric Bastiat’s essay, The Law: http://mises.org/books/thelaw.pdf
Thomas Jefferson said
“A government big enough to give you everything you want, is strong enough to take everything you have.”
and
"Peace is that brief glorious moment in history when everybody stands around reloading".