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Infrared photorefractor may be useful for pediatric refractive screening
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An eccentric infrared photorefractor may be useful in screening for refractive errors in children, two Scandinavian studies suggest.
Maths Abrahamsson and colleagues evaluated the viability of the PhotoRefractor (PlusOptiX) as a screening tool. They estimated the variability of the device in four patients. Cycloplegic refraction was determined using cyclopentolate and tropicamide, and this was compared to noncycloplegic refraction. The authors found a statistically significant difference between cycloplegic and noncycloplegic refraction for spherical and cylindrical refractive errors.
In a second study, data from the PhotoRefractor was compared to results from autorefraction or retinoscopy in 150 children between 6 months and 5 years of age. In 142 of the patients, the PhotoRefractor measurement was within 1 D of the autorefractor measurement. In the remaining eight patients, a difference of up to 16 D between the two sources was seen.
The studies are published in Acta Ophthalmologica Scandinavica.