low vision visual impairment
Conditions
Interventions
The first study will concern the effectiveness of visual stimulation in young
children in early intervention programs. The content of the intervention will
be based on previous studies of the Instit
Sponsors
Katholieke Universiteit Nijmegen
Eligibility
Age
2 Years to 11 Years
Inclusion criteria
Inclusion criteria: Study 1: 1. ocular or cerebral or cortical visual impairment 2. visual acuities between light perception and 3/10 3. Developmental age less then 24 months at the start of the intervention 4. congenitally or perinatally acquired impairments ;Study 2: Five participants will be included who comply with the same criteria as in study 1 with the exception that the maximum chronological age is 8 instead of 4 years
Exclusion criteria
Exclusion criteria: Study 1: 1. previously received intervention with regard to visual training or visual stimulation 2. acquired visual impairments 3. progressive or neurodegenerative impairments;Study 2: previously received visual training or visual stimulation according to the method of Hall and Bailey.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| In accordance with the recommendations of the commission the dependent variables in both studies will be measured at different levels of visual function, that is: - standard measures of visual functioning (grating acuity, contrast sensitivity, recognition acuity, field of vision by confrontation method) - behavioural measures of visual functions (scale for Near Detection Vision) - measures of visual perceptual functioning (imitation of smile) | — |
Secondary
| Measure | Time frame |
|---|---|
| Study 1: - measures of cognitive development at t0 and t3 (e.g. Reynell-Zinkin scales) - measures of parent-child interaction at t0 and t3 (Emotional Availability Scales of Biringen, 1998). Study 2: - task completion (reaction time and failure or success) | — |
Countries
Netherlands
Outcome results
None listed