AI-Powered Research

Normally sighted participants (controls): a visual acuity >= 0.8, aged 4 to 60
years old., Visually impaired children: a visual acuity >= 0.05 and <= 0.4 and
born after normal pregnancy and with a normal birth weight and without
additional impairments, aged 4 to 17 years old., Children with cerebral visual
impairment (CVI): diagnosed with CVI and having visited Bartiméus for
rehabilitation, treatment, diagnosis or checkups, aged 4 to 17 years old.,
Normally sighted children with an apparent delay in perception: a visual acuity
>= 0.8, normal visual field, fine motor skills sufficient to perform the tests.
Observations of ophthalmologists or optometrists of slow visual perceptual
speed and/or complaints about slow vision, aged 4 to 17 years old.

Exclusion Criteria

For the normally sighted participants (controls):
Fine motor skills insufficient to perform the tests., For the visually impaired
children:
Retinal pathology leading to a central scotoma,
Diagnosis of additional mental impairments., For the children with CVI:
Severe mental retardation and/or motor problems leading to problems to
understand or execute all the tests used in the study., Normally sighted
children with an apparent delay in perception: Fine motor skills insufficient
to perform the tests.

Study & Design

Study Type: Observational non invasive

Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
<p>The main parameter is the outcome of the new speed acuity tests (i.e.<br /><br>percentage correct answers and reaction times for the different sizes of<br /><br>optotypes, accumulated in a visual acuity and delay score).</p><br>

Secondary Outcome Measures

Name	Time	Method
<p>Additional parameters are the eye movement recordings (e.g., the number of<br /><br>saccades needed to fixate the target, fixation stability, and saccade<br /><br>properties such as amplitude-duration-velocity relationships), the results of<br /><br>the Developmental Eye Movement test (DEM) and Useful Field of View (UFOV) and<br /><br>the results of the funduspicture and OCT (for the group with an apparent delay,<br /><br>or if already available).</p><br>