Iron sights and How to Use Them (Is there an eye doctor in the house?)

Iron sights are very simple. But, most people struggle with them.

We know that the focus should be on the front sight. While keeping the
sights aligned, break the shot smoothly in the aiming area. If you do
that correctly, you get a good result and generally a good score.

If you don't have perfect vision or conditions, this gets a lot more challenging.

To help, we have corrective lenses that more easily allow focus on the
front sight. Tints can help maximize contrast between the white of the
target and the bull. Then, we have irises.

What is the proper use for an iris?

I have access to an indoor range that has pistol bays to 50 yards and a
rifle bay up to 100M. The lighting is really challenging. Some targets
are really bright and others dark. Some points have a spotlight
directly over the pistol, and others are much more dimly lit. Some
days, I wind up with brightly lit sights and a dark target. Other days,
I wind up with a brightly lit target and really dimly lit sights.

What is the correct way to compensate for too much light from the target bending around the front sight?

Google Norman Wong bullseye. There are a lot of posts he did that have been archived that are well worth reading.

http://www.lvsa.info/Documents/Nygord.pdf

What about sights?

The eyes have it.

These two articles have the answers.

Norman Wong is a master and also an optometrist. Check out his posts.

http://www.starreloaders.com/edhall/nwongarts.html

I have been reading those articles too. Many of them are about red dots, but "The Ideal Pupil" also addresses this question. Thanks.