Indicators of cerebral visual impairment include:
• Crowding i.e. difficulty differentiating between background and foreground visual information (e.g. can’t see items if they are on a patterned table cloth).
• Problems with fast eye movements.
• Problems with detection of movement.
• Problems with depth analysis.
• Visual field defect – peripheral vision easier than central vision.
• Vision appears to be variable, changing with circumstances.
• Vision may be better when either the object or the person is moving.
• Close viewing is common, to magnify the object or reduce crowding.
• Substantial impairment in function and making sense of what is seen.
• Often able to see better when told what to look for ahead of time.
• Colour vision is well developed, and visual acuity normal or sub-normal.
• Typically, paid carers inadvertently attribute the problems to poor attention or motivation.
• There are several causes, including cerebral palsy.
• If suspected, consider referral to ophthalmology or RNIB, Vision Assessment worker:
Learning Disability Sensory Impairment Lead
Learning Disability Liaison Team
2 Whittinghame Gardens
1091 Great Western Road