Clean Run - November 2017 - 36

© NaNcY gYEs

knowing what lenses they were wearing
or if they were wearing any at all. Unfortunately due to extenuating circumstances, results could not be obtained
from the study. But I mention it because
we subsequently contacted Dr. Murphy
and have benefited from his expertise in
several projects.

Final Thoughts

© NaNcY gYEs

My conclusion from all the studies and
my own research is that vision abnormalities are at the core of ETO behaviors.
It is likely that a variety of issues cause
ETOs, and at times a variety of defects
in the dog's eyes may add up to causing the effect of ETOs. There is not any
single issue that is solely responsible. We
have tested dogs with a very high level
of myopia who do not have jumping issues and dogs with results that are not
extreme who do have ETOs. Even if we
were able to test young dogs easily, and
through years of testing be able to produce an exact formula that causes ETOs,
there is no simple fix that will make ETOs
go away. Our dogs cannot wear traditional glasses, nor easily wear contact
lenses, and we don't have all the exact
formulas to correct their vision.

© NaNcY gYEs

Prevention amounts to doing research
before you buy an agility puppy to try
to discover if direct relatives may have
ETOs or be known to have produced
dogs with ETOs. As a breeder you can
try to do the best you possibly can to
do the same research in dogs you use
for breeding and being as open and
honest with puppy buyers about any
vision issues, just as you would with
any other heritable trait. As an owner
of an dog with ETOs, you can follow
all Linda Mecklenburg's guidelines for
managing and helping your dog (see
her article on page 7). You can read
as much as possible on the subject,
like the two-part article by Dr. Cynthia
Cook, "What Do They See and How Do
We Know," published in the January
and February 2009 issues of Clean Run
and available in the Magazine section
of their website: https://www.cleanrun.
com/index.cfm?fuseaction=category.
display&category_ID=459).
All of our dogs see things differently
than we do and equipment colors, spacing, and presentation of jumps affect

36

even good jumpers negatively at times.
We can only imagine that any vision abnormality added to that could create
even more difficult jumping situations.
If you have a dog displaying ETOs you
should certainly have that dog's vision
tested. There are other abnormalities like
PRA, iris atrophy, vitreous degeneration,
and likely many others I am unaware of,
which can cause ETO symptoms. Some
of these might be able to be treated or
at least you will have a better understanding of what is affecting your dog.
I would like to thank Lori Plummer for all
the collaboration over the years discussing ETOs and vision in dogs and for helping get the study with Dr. Gina Day started. Thanks to all my students and friends,
especially Channan Fosty, who I tortured
with jump grids and video sessions too
many times and who also made valuable
suggestions on this article. Thank you to
Linda Mecklenburg for all the time and
energy she has put into the wonderful
writing about how to help our ETO dogs,
and thanks to Clean Run for dedicating an
issue to this subject. And a very special
thanks to all of you with ETO dogs that
participated in our studies. I hope this issue shines more light not just on ETOs but
of how a dog's vision affects our sport. D

References
For the convenience of readers of the
print issue, we have included an online list of references on our website so
that you can click on a reference and go
directly to a cited article. Go to www.
cleanrun.com and select Magazine from
the navigation menu at the top left of
the screen. Scroll down under the main
photo and click on the "Read Archived
Articles" photo, then select the Heath Dogs category.
1. Ron Ofri, DVM, PhD; Steven R. Hollingsworth, DVM; Allyson Groth, BVSc; Monica J. Motta, BS; John H. Doval; Philip H.
Kass, DVM, PhD; Christopher J. Murphy,
DVM, PhD. "Effect of optical defocus
on performance of dogs involved in
field trial competition." American Journal of Veterinary Research, Vol 73, No.
4, April 2012. Download free PDF from
https://www.researchgate.net/publication/221977514_Effect_of_optical_defocus_on_performance_of_dogs_involved_in_field_trial_competition.

Clean Run | November 17


http://www.cleanrun.com http://www.cleanrun.com https://www.cleanrun.com/index.cfm?fuseaction=category.display&category_ID=459 https://www.cleanrun.com/index.cfm?fuseaction=category.display&category_ID=459 https://www.researchgate.net/publication/221977514_Effect_of_optical_defocus_on_performance_of_dogs_involved_in_field_trial_competition

Table of Contents for the Digital Edition of Clean Run - November 2017

Contents
Clean Run - November 2017 - Cover1
Clean Run - November 2017 - Cover2
Clean Run - November 2017 - Contents
Clean Run - November 2017 - 4
Clean Run - November 2017 - 5
Clean Run - November 2017 - 6
Clean Run - November 2017 - 7
Clean Run - November 2017 - 8
Clean Run - November 2017 - 9
Clean Run - November 2017 - 10
Clean Run - November 2017 - 11
Clean Run - November 2017 - 12
Clean Run - November 2017 - 13
Clean Run - November 2017 - 14
Clean Run - November 2017 - 15
Clean Run - November 2017 - 16
Clean Run - November 2017 - 17
Clean Run - November 2017 - 18
Clean Run - November 2017 - 19
Clean Run - November 2017 - 20
Clean Run - November 2017 - 21
Clean Run - November 2017 - 22
Clean Run - November 2017 - 23
Clean Run - November 2017 - 24
Clean Run - November 2017 - 25
Clean Run - November 2017 - 26
Clean Run - November 2017 - 27
Clean Run - November 2017 - 28
Clean Run - November 2017 - 29
Clean Run - November 2017 - 30
Clean Run - November 2017 - 31
Clean Run - November 2017 - 32
Clean Run - November 2017 - 33
Clean Run - November 2017 - 34
Clean Run - November 2017 - 35
Clean Run - November 2017 - 36
Clean Run - November 2017 - 37
Clean Run - November 2017 - 38
Clean Run - November 2017 - 39
Clean Run - November 2017 - 40
Clean Run - November 2017 - 41
Clean Run - November 2017 - 42
Clean Run - November 2017 - 43
Clean Run - November 2017 - 44
Clean Run - November 2017 - 45
Clean Run - November 2017 - 46
Clean Run - November 2017 - 47
Clean Run - November 2017 - 48
Clean Run - November 2017 - 49
Clean Run - November 2017 - 50
Clean Run - November 2017 - 51
Clean Run - November 2017 - 52
Clean Run - November 2017 - 53
Clean Run - November 2017 - 54
Clean Run - November 2017 - 55
Clean Run - November 2017 - 56
Clean Run - November 2017 - 57
Clean Run - November 2017 - 58
Clean Run - November 2017 - 59
Clean Run - November 2017 - 60
Clean Run - November 2017 - 61
Clean Run - November 2017 - 62
Clean Run - November 2017 - 63
Clean Run - November 2017 - 64
Clean Run - November 2017 - 65
Clean Run - November 2017 - 66
Clean Run - November 2017 - Cover3
Clean Run - November 2017 - Cover4
http://www.nxtbook.com/nxtbooks/cleanrun/1219
http://www.nxtbook.com/nxtbooks/cleanrun/1119
http://www.nxtbook.com/nxtbooks/cleanrun/1019
http://www.nxtbook.com/nxtbooks/cleanrun/0919
http://www.nxtbook.com/nxtbooks/cleanrun/0819
http://www.nxtbook.com/nxtbooks/cleanrun/0719
http://www.nxtbook.com/nxtbooks/cleanrun/0619
http://www.nxtbook.com/nxtbooks/cleanrun/0519
http://www.nxtbook.com/nxtbooks/cleanrun/0419
http://www.nxtbook.com/nxtbooks/cleanrun/0319
http://www.nxtbook.com/nxtbooks/cleanrun/0219
http://www.nxtbook.com/nxtbooks/cleanrun/0119
http://www.nxtbook.com/nxtbooks/cleanrun/1218
http://www.nxtbook.com/nxtbooks/cleanrun/1118
http://www.nxtbook.com/nxtbooks/cleanrun/1018
http://www.nxtbook.com/nxtbooks/cleanrun/0918
http://www.nxtbook.com/nxtbooks/cleanrun/0818
http://www.nxtbook.com/nxtbooks/cleanrun/0718
http://www.nxtbook.com/nxtbooks/cleanrun/0618
http://www.nxtbook.com/nxtbooks/cleanrun/0518
http://www.nxtbook.com/nxtbooks/cleanrun/0418
http://www.nxtbook.com/nxtbooks/cleanrun/0318
http://www.nxtbook.com/nxtbooks/cleanrun/0218
http://www.nxtbook.com/nxtbooks/cleanrun/0118
http://www.nxtbook.com/nxtbooks/cleanrun/1217
http://www.nxtbook.com/nxtbooks/cleanrun/1117
http://www.nxtbook.com/nxtbooks/cleanrun/1017
http://www.nxtbook.com/nxtbooks/cleanrun/0917
http://www.nxtbook.com/nxtbooks/cleanrun/0817
http://www.nxtbook.com/nxtbooks/cleanrun/0717
http://www.nxtbook.com/nxtbooks/cleanrun/0617
http://www.nxtbook.com/nxtbooks/cleanrun/0517
http://www.nxtbook.com/nxtbooks/cleanrun/0417
http://www.nxtbook.com/nxtbooks/cleanrun/0317
http://www.nxtbook.com/nxtbooks/cleanrun/0217
http://www.nxtbook.com/nxtbooks/cleanrun/0117
http://www.nxtbook.com/nxtbooks/cleanrun/1216
http://www.nxtbook.com/nxtbooks/cleanrun/1116
http://www.nxtbook.com/nxtbooks/cleanrun/1016
http://www.nxtbook.com/nxtbooks/cleanrun/0916
http://www.nxtbook.com/nxtbooks/cleanrun/0816
http://www.nxtbook.com/nxtbooks/cleanrun/0716
http://www.nxtbook.com/nxtbooks/cleanrun/0616
http://www.nxtbook.com/nxtbooks/cleanrun/0516
http://www.nxtbook.com/nxtbooks/cleanrun/0416
http://www.nxtbook.com/nxtbooks/cleanrun/0316
http://www.nxtbook.com/nxtbooks/cleanrun/0216
http://www.nxtbook.com/nxtbooks/cleanrun/0116
http://www.nxtbook.com/nxtbooks/cleanrun/1215
http://www.nxtbook.com/nxtbooks/cleanrun/1115
http://www.nxtbook.com/nxtbooks/cleanrun/1015
http://www.nxtbook.com/nxtbooks/cleanrun/0915
http://www.nxtbook.com/nxtbooks/cleanrun/0815
http://www.nxtbook.com/nxtbooks/cleanrun/0715
http://www.nxtbook.com/nxtbooks/cleanrun/0615
http://www.nxtbook.com/nxtbooks/cleanrun/0515
http://www.nxtbook.com/nxtbooks/cleanrun/0415
http://www.nxtbook.com/nxtbooks/cleanrun/0315
http://www.nxtbook.com/nxtbooks/cleanrun/0215
http://www.nxtbook.com/nxtbooks/cleanrun/0115
http://www.nxtbook.com/nxtbooks/cleanrun/1214
http://www.nxtbook.com/nxtbooks/cleanrun/1114
http://www.nxtbook.com/nxtbooks/cleanrun/1014
http://www.nxtbook.com/nxtbooks/cleanrun/0914
http://www.nxtbook.com/nxtbooks/cleanrun/0814
http://www.nxtbook.com/nxtbooks/cleanrun/0714
http://www.nxtbook.com/nxtbooks/cleanrun/0614
http://www.nxtbook.com/nxtbooks/cleanrun/0514
http://www.nxtbook.com/nxtbooks/cleanrun/0414
http://www.nxtbook.com/nxtbooks/cleanrun/0314
http://www.nxtbook.com/nxtbooks/cleanrun/0214
http://www.nxtbook.com/nxtbooks/cleanrun/0114
http://www.nxtbook.com/nxtbooks/cleanrun/1213
http://www.nxtbook.com/nxtbooks/cleanrun/1113
http://www.nxtbook.com/nxtbooks/cleanrun/1013
http://www.nxtbook.com/nxtbooks/cleanrun/0913
http://www.nxtbook.com/nxtbooks/cleanrun/0813
http://www.nxtbook.com/nxtbooks/cleanrun/0713
http://www.nxtbook.com/nxtbooks/cleanrun/0613
http://www.nxtbook.com/nxtbooks/cleanrun/0513
http://www.nxtbook.com/nxtbooks/cleanrun/0413
http://www.nxtbook.com/nxtbooks/cleanrun/0313
http://www.nxtbook.com/nxtbooks/cleanrun/0213
http://www.nxtbook.com/nxtbooks/cleanrun/0113
http://www.nxtbook.com/nxtbooks/cleanrun/1212
http://www.nxtbook.com/nxtbooks/cleanrun/1112
http://www.nxtbook.com/nxtbooks/cleanrun/1012
http://www.nxtbook.com/nxtbooks/cleanrun/0912
http://www.nxtbook.com/nxtbooks/cleanrun/0812
http://www.nxtbook.com/nxtbooks/cleanrun/0712
http://www.nxtbook.com/nxtbooks/cleanrun/0612
http://www.nxtbook.com/nxtbooks/cleanrun/0512
http://www.nxtbook.com/nxtbooks/cleanrun/0412
http://www.nxtbook.com/nxtbooks/cleanrun/0312
http://www.nxtbook.com/nxtbooks/cleanrun/0212
http://www.nxtbook.com/nxtbooks/cleanrun/0112
http://www.nxtbook.com/nxtbooks/cleanrun/1211
http://www.nxtbook.com/nxtbooks/cleanrun/1111
http://www.nxtbook.com/nxtbooks/cleanrun/1011
http://www.nxtbook.com/nxtbooks/cleanrun/0911
http://www.nxtbook.com/nxtbooks/cleanrun/0811
http://www.nxtbook.com/nxtbooks/cleanrun/0711
http://www.nxtbook.com/nxtbooks/cleanrun/0611
http://www.nxtbook.com/nxtbooks/cleanrun/0511
http://www.nxtbook.com/nxtbooks/cleanrun/0411
http://www.nxtbook.com/nxtbooks/cleanrun/0311
http://www.nxtbook.com/nxtbooks/cleanrun/0211
http://www.nxtbook.com/nxtbooks/cleanrun/0111
http://www.nxtbook.com/nxtbooks/cleanrun/1210
http://www.nxtbook.com/nxtbooks/cleanrun/1110
http://www.nxtbook.com/nxtbooks/cleanrun/1010
http://www.nxtbook.com/nxtbooks/cleanrun/0910
http://www.nxtbook.com/nxtbooks/cleanrun/0810
http://www.nxtbook.com/nxtbooks/cleanrun/0710
http://www.nxtbook.com/nxtbooks/cleanrun/0610
http://www.nxtbook.com/nxtbooks/cleanrun/0510
http://www.nxtbook.com/nxtbooks/cleanrun/0410
http://www.nxtbook.com/nxtbooks/cleanrun/0310
http://www.nxtbook.com/nxtbooks/cleanrun/0210
http://www.nxtbook.com/nxtbooks/cleanrun/0110
http://www.nxtbook.com/nxtbooks/cleanrun/1209
http://www.nxtbook.com/nxtbooks/cleanrun/1109
http://www.nxtbook.com/nxtbooks/cleanrun/1009
http://www.nxtbook.com/nxtbooks/cleanrun/0909
http://www.nxtbook.com/nxtbooks/cleanrun/0809
http://www.nxtbook.com/nxtbooks/cleanrun/0709
http://www.nxtbook.com/nxtbooks/cleanrun/comp-demo
http://www.nxtbook.com/nxtbooks/cleanrun/0609
http://www.nxtbook.com/nxtbooks/cleanrun/0509
http://www.nxtbook.com/nxtbooks/cleanrun/0409
http://www.nxtbook.com/nxtbooks/cleanrun/0309
http://www.nxtbook.com/nxtbooks/cleanrun/0209
http://www.nxtbook.com/nxtbooks/cleanrun/0109
http://www.nxtbook.com/nxtbooks/cleanrun/1208
http://www.nxtbook.com/nxtbooks/cleanrun/1108
http://www.nxtbook.com/nxtbooks/cleanrun/1008
http://www.nxtbook.com/nxtbooks/cleanrun/0908
http://www.nxtbook.com/nxtbooks/cleanrun/0808
http://www.nxtbook.com/nxtbooks/cleanrun/0708
http://www.nxtbook.com/nxtbooks/cleanrun/0608
http://www.nxtbook.com/nxtbooks/cleanrun/0508
http://www.nxtbook.com/nxtbooks/cleanrun/0408
http://www.nxtbook.com/nxtbooks/cleanrun/0308
http://www.nxtbook.com/nxtbooks/cleanrun/0208
http://www.nxtbook.com/nxtbooks/cleanrun/0108
http://www.nxtbook.com/nxtbooks/cleanrun/1207
http://www.nxtbook.com/nxtbooks/cleanrun/1107
http://www.nxtbook.com/nxtbooks/cleanrun/1007
http://www.nxtbook.com/nxtbooks/cleanrun/0907
http://www.nxtbook.com/nxtbooks/cleanrun/0807
http://www.nxtbook.com/nxtbooks/cleanrun/0707
http://www.nxtbook.com/nxtbooks/cleanrun/0607
http://www.nxtbook.com/nxtbooks/cleanrun/0507
http://www.nxtbook.com/nxtbooks/cleanrun/0407
http://www.nxtbook.com/nxtbooks/cleanrun/0307
http://www.nxtbook.com/nxtbooks/cleanrun/0207
http://www.nxtbook.com/nxtbooks/cleanrun/0107
http://www.nxtbook.com/nxtbooks/cleanrun/1206
http://www.nxtbook.com/nxtbooks/cleanrun/1106
http://www.nxtbook.com/nxtbooks/cleanrun/1006
http://www.nxtbook.com/nxtbooks/cleanrun/0906
http://www.nxtbook.com/nxtbooks/cleanrun/0806
http://www.nxtbook.com/nxtbooks/cleanrun/0706
http://www.nxtbook.com/nxtbooks/cleanrun/0606
http://www.nxtbook.com/nxtbooks/cleanrun/0506
http://www.nxtbook.com/nxtbooks/cleanrun/0406
http://www.nxtbook.com/nxtbooks/cleanrun/0306
http://www.nxtbook.com/nxtbooks/cleanrun/0206
http://www.nxtbook.com/nxtbooks/cleanrun/0106
http://www.nxtbookMEDIA.com