Screening for Suppression in Young Children: the Polaroid Suppression Test
| Autor: | J Van Hof-van Duin, DK Oosterveen, J. W. R. Pott |
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| Rok vydání: | 1998 |
| Předmět: |
Male
Visual acuity genetic structures Visual impairment Visual Acuity Sensitivity and Specificity AMBLYOPIA VISUAL-ACUITY medicine Humans Mass Screening Vision test Strabismus Mass screening Anisometropia Monocular PHOTOREFRACTION business.industry Vision Tests fungi food and beverages General Medicine medicine.disease eye diseases Ophthalmology VISION Child Preschool PRESCHOOL-CHILD Pediatrics Perinatology and Child Health STRABISMUS Optometry Female medicine.symptom business Monocular vision |
| Zdroj: | Journal of pediatric ophthalmology & strabismus, 35(4), 216-222 |
| ISSN: | 1938-2405 0191-3913 |
| DOI: | 10.3928/0191-3913-19980701-08 |
| Popis: | Background: Assessment of monocular visual impairment during screening of young children is often hampered by lack of cooperation. Because strabismus, amblyopia, or anisometropia may lead to monocular suppression during binocular viewing conditions, a test was developed to screen for suppression in young children. Methods: Children were invited to look through two polaroid filters of different polarization direction at two pictures covered with polaroid filters of opposite polarization direction. In this way, each eye could only see one of the two pictures. In cases of suppression, only one picture would be visible. Acuity measurements in 201 5-year-old children were compared with the Polaroid Suppresion test (PST) results. Results:The PST had a high success rate (99.5%) and testing time was under 1 minute. Specificity of the PST for acuity impairments was 91%. The low sensitivity of 60% was caused mainly by the fact that some children with binocular acuity impairments were not detected with the PST. However, the PST was highly sensitive for significant interocular acuity differences. Conclusion: The PST has been found to be a useful screening method for amblyogenic factors in young children. The test can be carried out without occlusion of one eye. The apparatus is portable, the test duration is short, and the costs are low. The results indicate that the PST is a very promising tool to use in clinical conditions and for screening large numbers of young children. |
| Databáze: | OpenAIRE |
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