Stick on disks, for use on your glases are available and have been avalible since the 1930s. You can buy them through adds in the American rifleman, the NRA publication, or Muzzle Blasts, The National Muzzle Loading Rifle Association publication. They are also available through adds in many of the popular shooting magazines.
Each of these publications rehashes the peepsight situation about once each year. The manufacturers "rediscover" the old models they have produced for decades about every decade(Lyman has been producing some of their designs since the 1800s), and new shooters jump on the bandwagon and replace the rediculious sighting equipment that the manufacturers send out on their shooting tools.
We do it about once each month, as new members "discover" what the military learned in the 1930s, buffalo hunters learned in the 1870s, and the Creedmore shooters learned in the 1860s. Everyone shoots better with peep sights, wheather they believe it or not. You see no "open sights" on the olympic firing ranges.
Oddly, since peep sights are not considered "traditional", only being used on crossbows since 1100ad and on jager rifles and target smoothbores cince the 1500s, peep sights are not allowed in "traditional" matches in the NMLRA. We get around this by using "buckhorn" sights with horns that curve until they almost meet, forming a large circle which we use as a peep.
Even a large peep apreture is more accurate than most open sights, and faster to line up. You do not look at it, you ignore it and only "see" the front sight, just like a flash sight picture on a combat pistol. If you are looking for the peep, in hazy light, your gun does not fit you properly and you are not using the sights correctly. You should never realize that the rear sight exists.
The size of the apeture actually controls how widely you are capable of missing. Theoretically, your shot can only miss the target by the width of the apeture. It is impossible to place your shot out of the field of view with the peep sight. If the Peep is the size of the bull, and you can see the bull in the hole, you cannot miss the bull unless you jerk the sights out of line with your trigger pull. That is why the target peeps are so small. They are precisely sized to sourround the bull, with only a minute ring of light, at the range being shot.
Technically, the only way someone can shoot worse with peep sights than with open sights is if they are simply not trying to shoot well! Peep sights become almost a necessity as our eyes age. There are some really neet ones out there for "primitive guns".
:m2c: