Q What is Behavioural Optometry?
A. Behavioural Optometry is practiced by qualified optometrists, who have an interest in how the eyes work in conjunction with the whole body ie how visual behaviour interacts with everything we do.
A child’s ability to learn is intimately related to their vision. At school, 80% percent of what your child will learn is obtained visually. Think about it, most of their learning happens in front of a whiteboard, computer or book. How the brain and eyes work together has a tremendous impact on the learning process.
Why is vision so essential to learning?
In school, your child will be using a wide range of visual skills including:
Digital devices have become part of our everyday lives. We use them for work, study, reading, playing and communicating with loved ones. For many of us, our
devices are the first things we greet in the morning and the last thing we use at night.
While there is no doubt that they have made some part of our lives easier and more convenient, they are also contributing to health issues, and one of those is digital eye strain.
What is Digital Eye Strain?
It was only a generation ago that only a small part of the population spent a lot of time reading or on a computer-like device. What was once the realm of the “geek” or bookworm, is now the norm for a much larger part of the population. Increased use of technology and digital devices means an increase in the amount of time spent relatively still while looking at near distances for long periods of time. This is not something our eyes were designed to so constantly and results in visual fatigue and eyestrain symptoms.
What are the symptoms of digital eyestrain?
Many people suffer hidden vision problems because they think that good vision is the same as clear sight. But the truth is vision is so much more than being able to see the whiteboard or read an eye chart. To help you pick up on the signs of hidden vision problems, here are five common but hidden eye conditions explained.
1. Convergence insufficiency
Convergence insufficiency occurs when you have difficulties maintaining how your eyes point together (converge) to focus on near work or read close. It can lead to headaches, eyestrain, double vision, blurred vision and reduced visual performance.
Interestingly enough, not everyone with convergence insufficiency experiences obvious symptoms, and many people can still pass the 20/20 eye chart test. There are many performance related issues that can occur with convergence insufficiency including loss of place with reading, reading avoidance and reduced concentration.
The following is a summary of some of the signs and symptoms that can occur while you’re reading or doing other close work and may include:
• Eyestrain (particularly after computer work or reading)
• Difficulty reading (words blur or move on page)
• Difficulty concentrating
• Short attention span
• Frequently lose their place reading
• Squint or close one eye
• Poor comprehension
• Double vision
• Not completing school work or homework
2. Amblyopia (lazy eye)
Amblyopia, or lazy eye as it is more commonly known, occurs when the eyes don’t work in unison. It often occurs with a difference in prescription between the two eyes or when an eye turn is present (see below). When the brain has difficulty making senses of the input from one eye, it favours the eye that can, by actively suppressing or “tuning out” the conflicting information from the other.
Amblyopia can also occur with Strabismus, is where one eye crosses and is no longer aligned with the fellow eye. The eye can cross in (esotropia) or turn out (exotropia). It’s important to pick this up early in children as their vision can deteriorate in the eye that can’t focus. Because the eyes aren’t working in harmony, it can also cause issues with depth perception, fine motor skills and clumsiness.
Symptoms of lazy eye include:
• An eye that appears to wander either inward or outward
• Squinting, or closing one eye so they can see better
• Complaints about things looking blurry
• Sensitive to sunlight
• Head tilting to try and focus better
• Poor vision
• Bumping into things because they find it difficult to judge distances particularly between objects
3. Accommodative Dysfunction
We often take it for granted that we can shift our focus from near to distance and back again without experiencing blurry vision. This ability to change focus is called accommodation. When accommodation works well, we are blissfully unaware of the process.
For people with Accommodative Dysfunction, holding focus at near distances, and being able to shift focus becomes more difficult. Sometimes this results in obvious symptoms like an intermittent blur, or noticing things take a while to come clear, but other times like with convergence insufficiency, the symptoms are not as obvious. This is because a child can bring things into focus with a lot of concentration so it can go unnoticed, but doing this does put a lot of strain on the eyes and on the ability to concentrate.
Symptoms of Accommodative Dysfunction can include:
• Reading avoidance
• Red or sore eyes
• Difficulty in copying from a board or screen then down on paper
• A diagnosed learning problem
4. Oculomotor Dysfunction
At Harmony Vision Care we are fortunate to have a team of leading optometrists who are passionate about helping our clients realise their best performance through better vision. One such member is Alice Forsyth, a behavioural optometrist who studied Optometry at UNSW and joined the Harmony Vision Care team in 2014.
In April, Alice traveled to Sydney to attend the 8th International Congress in Behavioural Optometry, along with the rest of the Harmony Vision team. Staying up to date with research and clinical practice is important to Alice, so when not cooking, spending time with her family or enjoying music, Alice enjoys reading and pursuing knowledge. To this end, she is currently studying for her Fellowship, which is a long road, and lots of hours of study!
We recently sat down with Alice for a quick question and answer session to find out why she’s so passionate about behavioural optometry and to help you get to know her a little better.
What inspired you to become a behavioural optometrist?
I was initially drawn into behavioural optometry to find more ways to help my son with his reading. Though I quickly came to appreciate the bigger picture that is vision. Over two million neurons connect the eyes to many areas of the brain (up to 60%), including input to regions that control touch, movement, attention and spatial judgment.
As optometrists, we like to pull things apart to discover how they work, but once we have that understanding we need to link the parts back together again, and there’s always a bigger picture.
What is the most rewarding part of your job?