Depth Perception Issues can lead to coordination issues and may not be Dyspraxia
Raymond
coordination ....especially fine motor skills
depth perception can cause problems with coordination...also..if you
have poor depth perception,of course you will have visual motor issues
and coordination issues
Many children have limited depth perception due to failures of proper
binocular vision. These deficits lead to poor eye-hand coordination,
clumsiness, and performance problems.
http://www.qeeg.com/vision.html
When Jordan came to WoW Vision Therapy Center at almost 5½, her
balance and coordination were poor. She struggled in any type of
athletics (catching a ball, kicking a ball, riding a bike) because she
had no depth perception. After a long process of vision therapy and
lots of patience from Monica, Jordan now can control both eyes. Her
coordination and balance have greatly improved.
http://www.visiontherapycenter.com/ss_item4.phtml
Poor depth perception The inability to judge distance and spatial
relationships accurately. Reported problems include difficulty with
escalators, walking up and down stairs, bumping into things, driving
judgment, poor ball sport performance and difficulty judging
differences in height and depth.
http://www.ansticevision.co.nz/irlen_syndrome.htm
those issues aren't necessarily dyspraxic......those can be just visual
problems
I am not talking about problems with the eyes themselves. It can be
related to the optical nerves.
Here is more information on depth perception
http://en.wikipedia.org/wiki/Depth_perception
I was in an optical class. We examined people's depth perception with
a test called steropsis test
http://www.stlukeseye.com/eyeq/Stereopsis.asp
This test helps the examiner evaluate the quality of the patient's
depth perception. While wearing special polarized glasses, the patient
looks at a series of 3-D objects that range from being very raised to
nearly flat. In each series, the patient is asked to select the object
with the greatest 3-D effect.
Kids are not just "born without depth perception". There must be an
underlying cause. It could be a mild amblyopia (lazy eye) or a small
angle esotropia (the eye turns in a little). It is also possible that
the child's depth percetion is normal and he simply did not understand
the test. I would get a second opinion from an optometrist or an
opthalmologist who sees a lot of kids. I'm not sure that a pediatric
neurologist would be able to diagnose the cause of the decreased depth
perception. However, (s)he may be able to tell you why your child is
developmentally delayed.
Andrew J. Alpar, OD, FAAO
http://en.allexperts.com/q/Ophthalmology-Optometry-979/depth-perception-1.htm
Two Eyes = Two Separate Views!
Human beings generally come equipped with two eyes and one head. Make
sure you have these necessary parts before attempting to see 3D. If you
have any doubts about your equipment or your ability to see 3D, check
out Why Some People Have Trouble Seeing 3D before continuing.
Unlike horses, humans have two eyes located side-by-side in the front
of their heads. Thanks to the close side-by-side positioning, each eye
takes a view of the same area from a slightly different angle. The two
eye views have plenty in common, but each eye picks up visual
information the other doesn't. Have you ever compared the different
views of your right and left eye? The Eye Hop Game lets you do just
that.
Two Eyes = Three Dimensions (3D)!
Each eye captures its own view and the two separate images are sent on
to the brain for processing. When the two images arrive simultaneously
in the back of the brain, they are united into one picture. The mind
combines the two images by matching up the similarities and adding in
the small differences. The small differences between the two images add
up to a big difference in the final picture! The combined image is more
than the sum of its parts. It is a three-dimensional stereo picture.
The word "stereo" comes from the Greek word "stereos" which means firm
or solid. With stereo vision you see an object as solid in three
spatial dimensions--width, height and depth--or x, y and z. It is the
added perception of the depth dimension that make stereo vision so rich
and special.
Stereo Vision Has Many Advantages
Stereo vision--or stereoscopic vision --probably evolved as a means of
survival. With stereo vision, we can see WHERE objects are in relation
to our own bodies with much greater precision--especially when those
objects are moving toward or away from us in the depth dimension. We
can see a little bit around solid objects without moving our heads and
we can even perceive and measure "empty" space with our eyes and
brains.
If You've Got Stereo Vision, Count Your Blessings!
According to the web site of the American Academy of Opthalmology,
September, 1996: "many occupations are not open to people who have good
vision in one eye only [that means people without stereo vision]"
Here are a few examples of occupations that depend heavily on stereo
vision:
* Baseball player
* Waitress
* Driver
* Architect
* Surgeon
* Dentist
Here are just a few examples of general actions that depend heavily on
stereo vision:
* Throwing, catching or hitting a ball
* Driving and parking a car
* Planning and building a three-dimensional object
* Threading a needle and sewing
* Reaching out to shake someone's hand
* Pouring into a container
* Stepping off a curb or step
Are You Sure You've Got Stereo Vision?
It's hard to know what you're missing, if you've never had it. Do you
see with both your eyes? Are your two eyes similar or different in
sight?
This Is Just A Test -- of Your Stereo Vision System
Are both your eyes turned on and working together as a team? Try this
easy test and find out if you are a good candidate for 3D viewing. It's
The Framing Game and it only takes a minute!
* To read more about the difference between the side vision of horses
and the frontal vision of humans, check out Dr. Cooper's really cool
explanation about the evolution of two-eyed vision in carnivorous
hunters (humans, lions, tigers, sharks, etc.).
You may have arrived at this page because you were searching for an
explanation as to why you can't see Spy Kids 3D or The Adventures of
Lava Girl and Shark Boy 3D. Can you see 3D? If you can't, keep reading
and find out why?!!
http://www.vision3d.com/stereo.html
depth perception issues can lead to problems with coordination
including especially oculomotor control
Dyspraxics can have depth perception issues. However, depth perception
issues aren't necessarily from Dyspraxia. People can have depth
perception issues and not be Dyspraxia. Depth perception issues can
occur independent of Dyspraxia.
also Dyspraxia and depth perception can be be comorbid(a word that
means that conditions can co-exist in same person),and so it doesn't
mean that depth perception is part of their dyspraxia.
See an opthalmalogist and/or optometrist for depth perception issues
before getting a Dyspraxia diagnosis.
It's possible that people with depth perception issues can be
misdiagnosed as Dyspraxia because of the coordination issues resulting
from their depth perception issues.
I have already explained this to Warren.
I feel that everybody should know all this stuff.
I feel that all alternative causes for coordination symptoms be
explored.
Raymond
Silverfin
Silverfin
Big Bill
wrote:
>Thank you for your interesting links.
>
>Silverfin
Can I add these?
--
http://www.britishdyslexiacentre.com/BDC/LearningDifficulties/Dyslexia/default.aspx
http://www.britishdyslexiacentre.com/BDC/LearningDifficulties/Dyscalculia/default.aspx
http://www.britishdyslexiacentre.com/BDC/LearningDifficulties/Dysgraphia/default.aspx
http://www.britishdyslexiacentre.com/BDC/LearningDifficulties/ADHD/default.aspx