Good Morning All,
It is important to understand that with or without prescription lense, it is not possible for the human eye to sharpely focus on the front sight, rear sight and target at the same time, yet you must concentrate on a correct sight, picture.
And then you must maintain the same sight picture from shot to shot.
I have talked with a number of the finest rifle shots in the world about sight alignment and sight picture. They and my eye doctor, all agree that the eye cannot bring all three (all at different focual) lengths in the same sharp focus at the same time. The eye can only focus on two of the three at any one time.
The best sight picture is to focus on the target and front sight, leaving the rear sight slightly out of focus, but concentrating on maintaining the same sight picture shot after shot.
This is all part of the total mental management
progam required to be a good shot, competetive or otherwise.
For this reson, it is a waste of time and money to go to the Opt Doctor without taking your rifle and a target to tape to a wall. If you cannot do this, save your money and stay at home.
PaulV's comment about the focal point in a lense is quite correct. This is just one of the reasons, I finally abandoned the B&L Rayban type of shooting glasses and went to the KnobLocks style.The Knoblocks are expensive, but I have now been using them for 15 plus years, so that initial expense is spread out over a numbe of years, and I expect to be shooting for at least 20 more years.
These frames use a single, round lense, and can be adjusted to center over your eye in any shooting position. Therefore the lense focal point can always be centered in the middle of the lense.
In addition different lense are easily and quickly inter-changeable on the same frame.
Regardless of the style, you will need two different tinted glasses; one in a medium amber tint. and one in a light lime green tint.
Forget about the rose red, brown or other colors. Scientific reasearch into this subject has conclusely proven that for shooting at a black target on a a white background under bright light (indoors or outdoors) the light lime green tint is overwhelmly the best color for the typical human eye.
The light green color allow the best target clarity while reducing harsh glare.
Th amber tint is for overcast or darker, subdued light conditions.
In the days before I needed prescipton corrections, my Raybans were tinted green and amber. Everybody that tried the light green marveled at the effect, but whatever reason, few made the change. The most common reason; they just never got around to it, BUT, BUT , they were going to do it before the next shoot. They still have not.
Human behavior is very interedting.
In my youth, my vision was 20/05; a big advantage. But then..., reality is, that we are not really all created equally. My vision today, at age 68, is 20/15 and that still helps.
For rondy work, where everything has to be PC, I would have my lense made up clear, in a type of old fashion frames, to keep everybody happy.
Best regards and good shooting,
John L. Hinnant
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