Comparison of visual assessment tests in multiply handicapped children

Area of Science:

• Ophthalmology
• Pediatric Neurology
• Developmental Neuroscience

Background:

• Assessing visual acuity in multiply handicapped children presents significant challenges.
• Existing methods like acuity cards and visual evoked potentials (VEP) have limitations.
• Understanding the efficacy of different visual assessment tools in this population is crucial.

Purpose of the Study:

• To compare visual acuity estimates obtained via VEP and acuity card techniques.
• To evaluate the success rates of VEP and acuity card tests in multiply handicapped children.
• To identify factors influencing test completion and agreement between methods.

Main Methods:

• Study included 52 multiply handicapped children aged 3-183 months.
• Participants had conditions related to prematurity, congenital anomalies, hypoxic insult, or other disorders.
• Visual acuity was measured using both visual evoked potential (VEP) and acuity card tests (Keeler or Cardiff).

Main Results:

• Success rates were high for both methods: VEP at 88% and acuity cards at 85%.
• Acuity card completion was significantly lower in severely disabled children and those with nystagmus (p < 0.05).
• When successful, acuity card results correlated significantly with VEP thresholds (p < 0.02), with VEP yielding better results in visually impaired children.

Conclusions:

• VEP and acuity cards provide comparable visual acuity estimates in multiply handicapped children.
• VEP testing offers a higher success rate, especially in children with severe disabilities or nystagmus.
• VEP may be a more reliable method for assessing visual function in challenging pediatric populations.