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Measurement of low vision in children and infants
P J Droste1, S M Archer, E M Helveston
1Department of Surgery, Michigan State University College of Human Medicine, Grand Rapids.
Insights
This study found that combining Teller acuity cards and visual function battery assessments effectively characterizes visual function in visually impaired children and infants across all levels of vision impairment.
Area of Science:
- Ophthalmology
- Pediatric Vision Assessment
- Low Vision Research
Background:
- Accurate assessment of visual function in infants and children is crucial for early intervention.
- Existing methods may have limitations in differentiating visual acuities across the spectrum of visual impairment.
- Cicatricial retinopathy of prematurity is a significant cause of visual impairment in children.
Purpose of the Study:
- To evaluate the efficacy of Teller acuity cards and a visual function battery in ranking visual function in visually impaired children and infants.
- To determine the discriminatory power of each method across different ranges of visual impairment.
- To establish an optimal combined approach for assessing pediatric low vision.
Main Methods:
- The study involved 14 older children with cicatricial retinopathy of prematurity and 31 preverbal infants with various causes of decreased vision.
- Participants were assessed using Teller acuity cards (preferential looking technique) and a visual function battery (gross behavioral indicators).
- Correlation analysis was performed between the two methods and with Snellen acuities in older children.
Main Results:
- Teller acuity cards and visual function battery findings showed high correlation with each other and with Snellen acuities.
- Teller acuity cards demonstrated superior discrimination in the moderate visual impairment range.
- The visual function battery proved more effective in assessing severely visually impaired individuals.
Conclusions:
- A combination of Teller acuity cards and the visual function battery provides comprehensive characterization of visual function in pediatric low vision.
- This dual approach enhances the ability to rank visual abilities across the full spectrum of impairment.
- The findings support the use of this combined methodology for improved assessment and management of visually impaired children and infants.
Abstract:
The authors evaluated a preferential looking technique (Teller acuity cards) and a set of gross behavioral indicators (visual function battery) for the ability to rank visually impaired children and infants on the basis of their visual function. Fourteen older children with a diagnosis of cicatricial retinopathy of prematurity who were capable of giving Snellen acuities and a group of 31 preverbal infants with decreased vision due to a variety of causes were tested. Teller acuity card and visual function battery findings were highly correlated with each other (and with Snellen acuities in the older group); however, the Teller acuity cards provided better discrimination in the moderately visually impaired range, whereas the visual function battery was better in the severely impaired range. It is concluded that, in children and infants, visual function over the entire spectrum of low vision can be characterized by using a combination of the Teller acuity cards and the visual function battery.