Shooting Sports USA - August 2018 - 29

Don Nygord's lensometer, now in the posession of Dr.
Wong. It's an extremely accurate piece of machinery

EYE ABERRATIONS
Within the cornea and lens, there is what we
call spherical aberration (SA). The cornea has
positive SA while the lens has negative SA.
While young, these two aberrations cancel
each other out. With aging however, the
corneal SA remains the same but the lens
SA changes. Even with the best efforts from
your eye doctors, older shooters don't see as
well, independent of eye health issues. Indoor
ranges with reduced lighting often become a
challenge with larger pupils, and the SA with
our senior shooters.

SHOOTERS' EXAM UPDATES
For pistol iron sight picture, including Precision
Pistol, Air Pistol and other similar disciplines
Exam in real space: I no longer check
the distance from the patient's eyes to the
front sight and set that distance for the
reading card before I proceed with the add
determination. It may work out fine but I
prefer to work outside in "real space."
I no longer consider the age of the shooter

nor the length of their arms to determine their
shooting Rx. It has become meaningless.
Philip Hemphill (10-time NRA National Police
Shooting Champion-PPC and two-time NRA
National Precision Pistol Champion) who
responded to a past survey preferred a +0.25
add when he was 58, while John Bickar
(holder of several NRA National Junior Pistol
Records) needed a +1.50 add. Although not
presbyopic, even today, John started wearing
this type of shooting Rx at the age of 19. This
type of add will prevent young shooters from
peeking at the bullseye when they take their
attention off the front sight.
When I examined Eric Pueppke (USAS
Assistant National Pistol Team Coach, Level
4 Advanced International Pistol Coach and
National Pistol Coach Development Staff), I
showed him two extreme lens powers which
did not work for him, but another power was
perfect. His wife Char meanwhile, saw the
best with her preference.
Eric told me, "... one comment I would
like to make is that many shooters kind of
take their vision for granted and don't realize
that even though they see well, they don't
see really well. We are all, of course, used
to seeing the world the way we do, and I've
run across so many shooters that thought
they had great vision, only to find out they
actually don't! I have to date found no one
that gives the complete examination that you
do, Norman. I still remember how you first
corrected my vision with glasses, and then
put in other shooter's lenses so I could 'see
the sights the way they do.' This was a real
eye opener. All of the great position, shot
process, and trigger control a shooter may
develop will be greatly diminished if they
have less than perfect vision."

SSUSA.ORG | AUGUST 2018

29


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Table of Contents for the Digital Edition of Shooting Sports USA - August 2018

Contents
Shooting Sports USA - August 2018 - Cover1
Shooting Sports USA - August 2018 - Cover2
Shooting Sports USA - August 2018 - 3
Shooting Sports USA - August 2018 - 4
Shooting Sports USA - August 2018 - 5
Shooting Sports USA - August 2018 - Contents
Shooting Sports USA - August 2018 - 7
Shooting Sports USA - August 2018 - 8
Shooting Sports USA - August 2018 - 9
Shooting Sports USA - August 2018 - 10
Shooting Sports USA - August 2018 - 11
Shooting Sports USA - August 2018 - 12
Shooting Sports USA - August 2018 - 13
Shooting Sports USA - August 2018 - 14
Shooting Sports USA - August 2018 - 15
Shooting Sports USA - August 2018 - 16
Shooting Sports USA - August 2018 - 17
Shooting Sports USA - August 2018 - 18
Shooting Sports USA - August 2018 - 19
Shooting Sports USA - August 2018 - 20
Shooting Sports USA - August 2018 - 21
Shooting Sports USA - August 2018 - 22
Shooting Sports USA - August 2018 - 23
Shooting Sports USA - August 2018 - 24
Shooting Sports USA - August 2018 - 25
Shooting Sports USA - August 2018 - 26
Shooting Sports USA - August 2018 - 27
Shooting Sports USA - August 2018 - 28
Shooting Sports USA - August 2018 - 29
Shooting Sports USA - August 2018 - 30
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Shooting Sports USA - August 2018 - 35
Shooting Sports USA - August 2018 - 36
Shooting Sports USA - August 2018 - 37
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Shooting Sports USA - August 2018 - 39
Shooting Sports USA - August 2018 - 40
Shooting Sports USA - August 2018 - 41
Shooting Sports USA - August 2018 - 42
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Shooting Sports USA - August 2018 - 47
Shooting Sports USA - August 2018 - 48
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