I must pipe in because I have an increasing problem related to this. And, although the front site should be in focus, I can say from expereince that if you essentially cannot see the rear site, your ability to line up the sites will go to pot and as John indicates: TOO blurred to shoot well.

One attempt at resolving this would be a lighted rear site utlizing a ghost ring and lighted front site so those of us suffering from dimishing close vision could use "iron" sites. My ability to see the front site is also decreasing. I can see far very well but my arms are becoming too short to see things that I hold in my hands to see. The problem is most enhanced in low light. Shooting my bow is now a day time activity and forget those dusk shots anymore.... boohoo. I know they have lighted sites for bow now, and it appears I will need to upgrade before next season...

I heard about a guy who went to an eye doc (a friend of mine) and the guy wanted to improve his vision for shooting. Well, the patient leaves, walks to the parking lot and pulls out his rifle and starts pointing it at distant things... This was in an urban environment. Well, within moments the police arrive with great alacrity and with considerable noise. Yes they did arrest this fellow. Luckily my friend the eye doctor was able to convince the police that the gentleman did in fact set up an appointment with him and he gave him glasses just minutes before so he could see to shoot better, so they dropped the charges. But the guy should NOT have 'tested out' these glasses with his rifle in the parking lot...

Aside from reverse bifocal glasses I ahve to believe there are better designed rear sites (and rear site / front site combination) for low light and aging eyes.

I hope this thread gets some good recommendations because this issue is a major one and growing...