Theodore Roosevelt was an internationally recognized good shot. He also had world class poor eyesight. He experimented with all types of iron sights, trying to discover one that allowed him to get a clear sight picture. The sight he use exclusively was a small barley corn front sight, mated to a low rear sight,with a gradual V, culminating in a round bottomed notch.
Don't you think, with the Roosevelt fortune behind him, if there was a better sight for poor eyesight he would have found it? For years Iused what at the time was called the California, or Patridge sight. It is a big shark fin front sight, that is quite wide. It is mated to a high rear sight with a deep, wide, square notch.
I only wish I had read Teddy's views on iron sight earlier.
Hungry Horse