Impact

Eyelander at CVRS London 2023

Timothy Hodgson Conferences, Eyelander, Impact

Last week I attended the 18th Biennial Child Vision Research Society meeting at UCL Great Ormond Street Institute of Child Health. The meeting included a symposium in honour of the late Oliver Braddick, co-founder of the UCL/Oxford Visual Development Unit together with Janette Atkinson who gave an impressive overview of the unit’s pioneering work on infant vision over the decades as part of the session.

Amongst the many other highlights of the meeting, Cathy Williams (University of Bristol), presented evidence for sub-types of Cerebral Visual Impairment (CVI) in children. It has become apparent recently that a surprisingly high proportion of children in main stream classrooms may have such brain based visual problems.

My own talk about the Eyelander game was the last presentation of the conference! But everyone stayed right to the end and seemed to really enjoy it! Eyelander is a gamified version of compensatory visual search training for children with loss of vision on one side (hemianopia) . Selective loss of vision to the left or right might occur following brain injury or neurosurgery, but may also be found in many children with CVI (see above).

I really enjoyed the CVRS meeting. It was great to meet so many new people. In fact, it was one of the friendliest and most enjoyable meetings I’ve ever been to, so I will be sure to go again in 2 years time!

Eyelander game at VIEW conference

Timothy Hodgson Conferences, Eyelander, Impact , ,

Recently I attended the VIEW conference for Visual impairment (VI) specialist teachers and professionals in Birmingham, to raise awareness of our Eyelander online game for children with partial visual field loss (Hemianopia).

Eyelander is based on visual search training programmes that have been shown to be effective in improving functional visual abilities in adults that suffer from Homonymous visual field loss following stroke. In the game you have to search for coloured shapes amongst “distractor” shapes, with varying levels of task difficult as the game progresses. As you complete more searches your character (the “Eyelander”) make progress in escaping a volcanic desert island.

The game is available to play via a web browser, either on a computer with a mouse / laptop or a touch screen device. Its efficacy was validated via a published small scale trial in a group of children and young people with well defined hemianopia, suggesting playing the game every day over a period of 4 to 6 weeks can lead to improved visual abilities.

There was lots of interest in the game from VI teachers, who feel that partial visual field loss and problems seeing on one side is very common in the children they work with. Estimates for number of children with some form of brain based visual impairment (also known as Cerebral Visual Impairment or CVI) and many of these may have visual field problems. Given this we are keen for more parents, children, teachers and others working with children with VI to know about Eyelander and to give it a go.

So visit www.eyelander.co.uk and register to play!

Orienting to social cues in Parkinsons

Timothy Hodgson General news, Impact, Parkinsons, Publications, social neuroscience

This month we published a paper in the journal Experimental Brain Research reporting how eye movements are influenced by social cues in people with Parkinsons disease.

Previous studies have suggested that Parkinsons patients have problems in directing visual attention due to loss of the chemical dopamine within the basal ganglia of the brain, but no one has specifically looked at whether they have particular problems with social cues. This question is important as problems with processing social information may lead to difficulties in everyday life for people with Parkinsons. It is also a question of scientific interest as it has been suggested that we have specialised brain pathways for processing social information (the so-called “Social Brain hypothesis”).

We used a task in which pictures of someone else’s eyes, arrows and pointing fingers are shown on a computer screen, whilst people track a spot jumping around the screen with their eyes (see picture; you can see a video of the task here). Often people make an eye movement by mistake in the direction indicted by the eyes, arrows or fingers, even when they are meant to respond directly at the target (the little black spot) and ignore the pictures. We found healthy adults made more of these errors with pointing finger cues compared to the other cue types (suggesting pointing fingers provide a particularly strong cues to eye movements) whereas people with Parkinsons made similarly high errors for all 3 cue types.

Although not specifically better or worse for socially relevant cues (eyes / fingers), Parkinsons patients clearly had difficulty in suppressing their distracting influence. This suggests the basal ganglia plays a role in controlling eye movements in response to social and non-social cues. But this doesn’t mean that people with Parkinsons don’t have particular problems with maintaining attention in social situations. On the contrary, social interaction might often take place in a busy environment, with lots of sensory information competing for attention. These deficits in the control of eye movements might therefore lead to difficulty in social interaction and might impact on patients’ quality of life.

A link to the paper can be found here

Assessing premorbid IQ with picture vocabulary tests

Timothy Hodgson General news, Impact, Publications

An important task in neuropsychology is establishing how a patient’s current state compares to how they were before they suffered  brain injury. Assessing “premorbid” IQ is also of key importance in research studies that compare cognitive abilities in patients with a group of healthy participants, as it is important that the two comparison groups are as well matched as possible.

The most common way of assessing premorbid IQ to date is the National Adult Reading Test or “NART’. This short word reading test includes words with regular and irregular spellings and is highly correlated with IQ, whilst also “holding” after brain injury (being relatively unaffected relative to other tests of cognitive function). The problem with the NART is that it requires patients to read words out loud. Brain injury can also impair speech ability meaning that the test is impossible to use in patients with conditions such as aphasia.

We have recently published a paper in the journal Applied Neuropsychology: Adult which examined the effectiveness of the British Picture Vocabulary Scale (BPVS) as an assessment of premorbid ability. In this test patients’ must point to pictures matching the words spoken by the examiner. Originally developed to assess vocabulary in young children, we found that the BPVS appears to be at least as good as the NART at “holding” after brain injury and assessing premorbid IQ.

Along with other similar picture based tests, we think the BPVS could be a useful tool to assessing premorbid IQ in research as well as clinical neuropsychology practice.

Eyelander Goes Mobile

Timothy Hodgson Eyelander, Impact

The Eyelander game for children with visual field loss is now compatible for use on mobile devices such as phones and tablets!

The game is based on visual search training that has been shown to be effective in improving functional visual abilities in adults with homonymous hemianopia. Our recent evaluation trial showed Eyelander delivered similar magnitude of improvement in functional visual abilities in children and young adults as the more boring adult training programmes. You can play the game and sign up for research to give us feedback on the game via the Eyelander website http://www.eyelander.co.uk. It is free to play and is designed to be colourful, fun and engaging for children. Players search for shapes on the screen which help their character to escape from a mysterious island.

We have been taking a step by step approach to making the game more widely available as we build the evidence base for its effectiveness, but we decided now was the time to make it more widely available for tablets and phones. It actually makes the game more fun to play using a touch screen rather than a mouse and cursor so I am really pleased with the results.

 

 

 

 

 

The game was developed in collaboration with The WESC Foundation Exeter, the School of Computer Science University of Lincoln and Mutant Labs Ltd Plymouth. See here for previous blog posts on the game development and evaluation: Eyelander game evaluation and Parkinsons and Spatial Memory studies published “EyeLander” game for children with VI now available! “Game-ifying” visual search training for children