Visual & Clinical Eye Tracking Assessment

Do You or anyone you know suffer from any the following?

  • Dislike or avoidance of reading and other close work
  • Loss of place while reading or copying
  • Trouble finishing assignments in the allotted time
  • Omitting or misreading words or letters
  • Slow, inaccurate copying
  • Distractible, loses attention quickly
  • Blurred, double or unstable vision
  • Headaches, eye strain or visual fatigue associated with reading or other close work

 

You are not alone!

Many people are affected by learning related vision disorders!

Approximately 25% to 40% of the general population is affected by some degree of learning related vision disorder. This percentage increases dramatically in learning disabled and remedial reading populations, where as many as 90% of the people have a significant visual disorder component to their learning problems.

 

 

I recently had a sight test and have 6/6 vision, Do I need to worry?

Possibly. Being able to read the letters on a chart at 6metres/20 feet does not guarantee efficient learning related vision skills. In fact, the people most handicapped by vision or sensory-motor deficits often have good eyesight and healthy eyes. The problems that occur with eye alignment, focusing and visual endurance, which may affect schoolwork, may be missed in school screenings or a conventional eye exam.

Below is a list of candidates to benefit the most

 

  • Headache/migraine sufferers
  • A diagnosis of Convergence Insufficiency
  • Disparity between reading ability and IQ
  • Dyslexics and those with reading difficulties
  • Dyspraxics
  • Difficulty copying from the board
  • Strabismus (eye turn)
  • Amblyopia (lazy eye)
  • ADHD
  • Autism
  • Sports competitors/athletes
  • Balance problems
  • Travel sickness

 

What is the difference between eyesight and vision?

Eyesight is the physical process of detecting patterns of light and contrast with the eyes. It is the ability to see small objects at a given distance clearly. The accepted measurement is 6/6 visual acuity.

Vision is the learned process that allows the brain to efficiently gather and use the information that is seen through the eyes. Vision provides the brain with an efficient channel for monitoring our attempts to move through, or change the environment. Vision includes skills such as eye tracking, eye teaming, focusing, convergence insufficiency (CI) and perceptual relationships. This covers a wide range of abilities, from specific learning disabilities to elite sportspeople. In practice, most people seeking this type of intervention are children

What is a Visual & Clinical eye tracking assessment?

A Visual & Clinical eye tracking assessment takes an interest in the visual behaviours of the patient and how the entire posture of the patient aligns in accordance with these visual behaviours. So, we can see how much of the patient’s brain is pre occupied with the mechanics of reading rather than the content they are reading.

It is a personalized treatment program designed to assess and correct visual system deficiencies caused by stress, inadequate sensory- motor development, or trauma to the nervous system, all of which interfere with the ability to efficiently use the visual system. Time is allocated in order to evaluate and classify the visual behaviours, and to probe into their likely causes. This involves an assessment of eye muscle function, eye teaming, focusing and coordination, observation of visual behaviour during desk work activities, and other general developmental activities

One of the main technologies we use during the assessment is the eye tracker.The eye tracker is a device with Infra red cameras used to detect eye movements during reading. The system uses a small bar which is mounted below a computer screen.  The bar incorporates IR cameras which detect the position of the eyes to within less than 1 degree. A wide range of test stimuli can then be presented on the screen and following a quick calibration, the system records the position of each eye at approximately 60 measurements per second. The software replays exactly where the patient was looking and shows the horizontal and vertical position of the eyes and convergence/phoria.  Powerful built-in analysis algorithms automatically provide a range of statistics relating to reading performance.

It shows the position of the eyes in relation to each other, and to the text, and conclusions can be drawn as to the reading speed, efficiency and other factors for example, such as how much time eyes fixate on a word, which impacts on processing time, and so on.If the eyes are not working in a coordinated manner, then all sorts of learning and processing issues arise.This may add to the burden of other developmental delays/variations or problems which may already exist, thus making the learning experience really tough.

 

What happens after a Visual & Clinical eye tracking assessment?

There are 5 possible outcomes of an assessment. 

  1. No action.
  2. Specially prescribed reading spectacles, possibly in the form of bifocals, or including prism lenses, to maximise visual efficiency for near tasks
  3. A programme of vision therapy activities to address any weaknesses. An idea as to the length of the programme, and the frequency of appointments (weekly, fortnightly or monthly)
  4. A combination of 2&3
  5. A referral to another practitioner or discipline where appropriate