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Academic Difficulties and Visual Symptoms in Children with Concussion : An article review

4/29/2019

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Thank you to COVD for writing this piece. COVD
​ Link:
https://covdblog.wordpress.com/2017/12/01/travelgrantspo2/

Last year, Amanda Beaudry, OD, MS  and Emily Cheng, OD received Travel Grants for the 2017 Annual Meeting with their summaries of an article on academic performance and concussion. We’ve shared it with you here, combined with new practice-relevant insights, as inspiration for this year’s applicants!

Childhood traumatic brain injury and concussions have been on the rise. While most children who suffer a concussion are recovered in 7-10 days, there is a substantial minority whose symptoms persist for longer, and this can impact their academic performance. The current standard treatment after a concussion is “cognitive rest.” The Zurich Consensus Report outlines guidelines for when it is safe to Return-to-Play in athletes who suffer from concussions, however, there are less universally-accepted guidelines for Return-to-Learn. In order to develop a Return-to-Learn protocol, it is necessary to know what symptoms are associated with academic difficulty. Studies have shown that the visual system is affected after concussion, yet vision is rarely included in Return-to-Learn protocols. The official2014 National Athletic Trainers Position Statement recommends testing smooth pursuits, nystagmus, and pupil reflex, which may be important with sports, but does not mention any convergence,accommodation, or saccade testing, which are important for academics and learning.

The purpose of the study “Academic Difficulty and Vision Symptoms in Children with Concussion” was to evaluate a group of children with prolonged post-concussive symptoms to determine if vision symptoms are associated with increased academic difficulty. This study retrospectively reviewed data of 1021 children who were evaluated at Children’s Hospital of Alabama between the years 2007 to 2013. The data collected on each child was reported by parents and child at the point of care and included demographic information, concussion event history, previous medical history, symptom history, and Sport Concussion Assessment Tool 2 scores (SCAT2). The date of concussive event was recorded as the “index date”. The symptom history included questions about 13 symptoms typically associated with a concussion and included a yes/no question about having academic difficulty after the concussive event. Using time since index date and symptom history, a subset of children showing 3 or more symptoms present for 10 days or more were identified as having prolonged post concussive symptoms. The primary symptom of interest was reported vision problems. The SCAT2 captures symptom severity on a 1 to 6 scale about 22 concussion-related symptoms. It also includes the severity results, Maddock’s side-line assessment, brief physical assessment, and balance assessment, The dependent variable was academic difficulty after concussive event. A higher overall SCAT2 score indicates better performance. For the symptom score, cognitive and balance subset, a higher score indicates less symptoms. For symptom severity subset, a higher score indicates worse symptoms. The subset of children identified with prolonged post concussive symptoms included 276 subjects ages 5 to 18 years old.
The most common symptoms were headaches (98%) and dizziness (70%).  Fatigue, vision abnormalities, nausea and concentration difficulty were present in 40 to 50% of the subjects. Balance problems, confusion, hearing disturbances and vomiting were less common, present in 20 to 30% of subjects.

All of the symptom variables were associated with academic difficulty except headaches. Lower symptom score and higher symptom severity scores were associated with academic difficulty. Concentration difficulty, confusion, and balance difficulty were all associated with academic difficulty. Vision and hearing were associated with doubling the odds of academic difficulty. Concentration difficulty accounts for a 21 fold increase in odds.   What was most interesting was that for those with symptoms longer than 30 days, only vision and concentration difficulty remained significant for academic problems.  This finding does make sense, since learning is highly vision-dependent and that the brain is known to have 30 areas that are dedicated to vision.   This study and previous studies suggest that visual acuity is NOT enough to identify problems related to visual dysfunction.

This study does have a few limitations. Firstly, the responses used for analysis are all based on self-report, and may or may not relate to objective findings. Also, it cannot be concluded what the direction of causation is between vision problems and academic difficulty from this study. It is possible that children with academic difficulty may have had pre-existing academic difficulty that could skew this finding.Although the American Academy of Pediatrics consensus reportlists vision as a common problem after concussion that it may interfere with Return-to-Learn, no vision specialists were included in the Return-to-Learn readiness decision-making process. This study supports the view that vision specialists should be given a greater role in assessment for Return-to-Learn, as well as in addressing any visual needs of children with concussion.
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This study makes a strong statement for the need of detailed functional vision testing in students who have sustained a mild traumatic brain injury or concussion, especially if symptoms persist longer than a few weeks.  If we can identify the cause of students’ academic struggles, then we can treat them, and we can prevent such students from experiencing unnecessary hardship and frustration in returning to the classroom. 
If your child has suffered a concussion, find a member of COVD near you for a comprehensive vision exam and get the full picture on their readiness to Return to Learn!

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Driving Again After a Traumatic Brain Injury (TBI)

4/16/2019

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Thank you to COVD for writing this piece.
COVD Link: Driving Again After a Traumatic Brain Injury (TBI)

Today’s guest blogger is Dr. Derek Tong.  Dr. Tong graduated with Honors from the Southern California College of Optometry at Marshall B. Ketchum University, where he also completed residency training in Pediatric Optometry and Vision Therapy.  He is the Clinic Director and Residency Coordinator of the Center for Vision Development Optometry in Pasadena CA.    The center focuses on working with children and adults with traumatic brain injury, strabismus, amblyopia, learning problems, and other unique vision needs. He is an Adjunct Clinical Assistant Professor of both the Southern California College of Optometry at Marshall B. Ketchum University and the Western University College of Optometry.  Professionally, he is a Trustee and past President of the San Gabriel Valley Optometric Society.  He had also served as a school board member at the Christian school near his home.  In his spare time, he enjoys travelling with his family and teaching children’s Bible lessons at his local Bible Study Fellowship.

The US Center for Disease Control (CDC) reported that there are over 2.5 million new cases of Traumatic Brain Injury (TBI) each year.  Motor vehicle accidents (MVA) account for 14% of all TBI cases.  According to the United States National Highway Traffic Safety Administration (NHTSA), there were 5.8 million motor vehicle accidents in 2008 with a total of 1.6 million individuals injured.  Data from the US Department of Defense indicated there were over 300,000 TBI cases in the US military since 2000.

Research conducted at the State College of New York (SUNY) State College of Optometry showed that 90% of TBI patients were found to have vision dysfunctions such as binocular vision dysfunctions, oculomotor anomalies, accommodative dysfunctions, strabismus, and cranial nerve palsies.  The most common symptoms reported by the patients included loss of balance, dizziness, eyestrain with near tasks, light sensitivity, headaches, near vision blur, vertigo, and motion sickness.  These symptoms often make driving very challenging since operating a motor vehicle is a complex multi-sensory process involving integration of visual, perceptual, auditory, motor and cognitive skills.   Individuals who suffered from a TBI often feel discouraged and hopeless when going through a recovery process that seems to be slow and long.   They often notice difficulty with parking (visual spatial perception), feel unsafe with judging the distance from the other cars (depth perception), or are bothered by the sun light or reflections from the on-coming traffic (glare).  It can become very frustrating.  The good news is that current research studies have confirmed that the vision dysfunctions that occur after TBI are highly correctable through vision rehabilitation.
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Vision rehabilitation for driving may include the following treatment modalities:
1. Compensatory lenses for nearsightedness, farsightedness, and/or astigmatism to maximize clarity of central vision when reading road signs.
2. Therapeutic prisms lenses to enhance visual-spatial awareness and/or peripheral vision when driving on the freeway, the street, and during parking.
3. Tinted lenses with Ultraviolet (UV) coating to protect against the bright sunlight and the harmful light rays.
4. Anti-glare coating to minimize glare from on-coming traffic when driving at night.
5. Optometric Vision therapy to rehabilitate any vision deficiencies such as visual tracking deficiencies, binocular vision disorders, and visual-motor dysfunctions that interfere with safe operation of a motor vehicle.  An example of such a case was featured in the COVD journal (Tong & Zink, 2010)
6. Other treatment modalities as prescribed by the Optometrist who provides vision evaluation and rehabilitation for TBI patients.
Life may not be the same after a TBI, but it can still be good with the right help and support. To locate an Optometrist who provides vision rehabilitation in your area, please visit www.covd.org or www.nora.cc

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Treating amblyopia without the patch

4/1/2019

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Thank you to COVD for writing this piece. COVD
​ Link:
https://covdblog.wordpress.com/2018/06/20/treating-amblyopia-without-the-patch/

During my optometry residency last year, I had the fortune of attending Dr. Sanet’s 2-day course at the COVD Annual Meeting. Recognized as a leading expert in developmental optometry, Dr. Sanet discussed the superiority of monocular fixation in a binocular field(MFBF) over patching for the treatment of amblyopia (also know as “lazy eye”). MFBF is a vision therapy technique that teaches both eyes to work together as a team, instead of blocking the stronger eye to make the “lazy eye” catch up on its own.

My time as a student and resident at SUNY had already encouraged the use of MFBF as often as I could in the middle and end stages of vision therapy, but it had never occurred to me to use it in place of patching at the beginning as Dr. Sanet suggested.  Yet the idea of promoting teamwork between the two eyes immediately made perfect sense, and I couldn’t wait to try it for myself.

Unfortunately, I had no new amblyopia patients for the remainder of my residency, and almost eight months passed before my first opportunity to try this patch-free strategy.
After discussing all the options with the eligible patient’s parent, we decided to skip the patch and give MFBF-only treatment a try. It made sense in this case to promote teamwork from the start instead of  spending time strengthening the “lazy” eye alone.  To everyone’s excitement, the results have been fantastic! 

After 2 months of treatment purely with MFBF vision therapy activities, we were able to bring a 20/80 refractive amblyope with 5.00D of anisometropia down to 20/40. Not only has the acuity drastically improved, but we’ve also developed strong global and local stereopsis (3D vision), and the patient is continuing to improve. Through MFBF activities, we took an eye that was being figuratively crushed by its prescription and helped it work with its fellow eye for the first time in this child’s life.

Since this is just a single case from my personal experience, it’s still up for debate whether treatment with MFBF vision therapy has sped up the process as opposed to patching.  Regardless, for this particular patient and parent, we were able to remove the stigma of the patch and alleviate the fear of spending multiple hours each day with sight from only one, weaker eye.  Instead, we allowed the stronger eye to serve as a guide for the weaker eye and developed teamwork right from the start.

If nothing else, I have ended up with a new trick in my toolbox, an extremely grateful parent, and a kiddo who smiles at every weekly appointment when he sees the progress he’s made.  A perfect win in my book.
The most rigid views
Will one day be overwhelmed
By the smallest change
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Dr. Matthew Roe is an Assistant Professor at the Arizona College of Optometry (Midwestern University) where he currently teaches the Pediatric Optometry and Non-Strabismus Binocular Disorders courses.  He additionally serves as a clinical preceptor in the Pediatrics, Vision Therapy, and Sports Vision clinics.  He received his degree from the State University of New York College of Optometry, and is a Fellow of the American Academy of Optometry.

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"Our daughter is a very good student who used to breeze through all her assignments except those requiring extensive reading. Long history or science assignments caused her great anxiety and took a long, long time to accomplish. Since she had Vision Therapy, she has been handling her reading packets easily and best of all happily. She has easily reduced her homework time to an hour! Similarly, she is a good athlete a gymnast and a swimmer who could never make any team sport requiring hand-eye coordination. She now feels comfortable pitching, and catching, and making baskets. Finally, she no longer gets car sick. Vision Therapy is the greatest." (read more...)

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