Vision and Function

Vision is not one thing

• Colour• Depth• Motion • Form

• Detection• Resolution• Recognition

Two systems

• Central - cones

form, detail, colour, high contrast (daylight), static images

• Peripheral - rods

motion, depth, low contrast (night vision), locating objects in space

Aspects related to visual abilities

• Type

• Degree

• Onset

• Prognosis

Individual characteristics

• Psychomotor development

• Cognitive development

• Affective development

In relation to environmental conditions

• Physical

• Psychological

ICF• Learning and applying knowledge

• General tasks and demands

• Communication

• Mobility

• Self care

• Domestic life

• Interpersonal interactions and relationships

• Major life areas

• Community, social and civic life

Lea Hyvarinen's 4 leafed cloverof visual functioning

The Eye

• the importance of vision

• how the eye works

Visual Development

• Vision is a learned process.

• When babies are born their vision is not yet fully developed.

• Children’s sight continues to develop in the first years of life by being used.

• It mainly develops during the first year, but continues developing until children are around seven years old.

Main functions of vision• focus• movement• visual acuity• visual field• stereoscopic vision• colour vision• contrast sensitivity• light sensitivity• visual perception

http://www-edc.eng.cam.ac.uk/betterdesign/downloads/impairmentsims/

Vision promotion

• Developmental setback

• Form vision

Early Support VI Journal

• Record of developing vision

• Developing vision activity cards

• Visual environment and visual materials cards

Workshop

• Observing Megan