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SVOne comparable to traditional refractive error measures
The SVOne provides measurements of spherical equivalent refractive error in both children and adults that are not significantly different from those of other standard clinical procedures, according to researchers in Optometry & Vision Science.
Researchers compared the findings of the SVOne (Smart Vision Labs) with retinoscopy, subjective refraction and two commercially available autorefractors in a pediatric population.
The study included 40 visually normal children between the ages of 5 and 17 years with and without cycloplegia. Refractive error was tested in the right eye using the five techniques. Researchers repeated the entire procedure in a subgroup of five subjects.
No significant difference was found between the mean values of spherical equivalent for the different techniques.
A one-way analysis of variance indicated that the only significant difference between the techniques was for the pre-cycloplegic, researchers said.
Retinoscopy had the best agreement with subjective refraction, with or without cycloplegia, followed by the open-field WAM-5500 (AIT Industries), according to researchers.
Researchers reported the most repeatable procedures were the WAM-5500 and retinoscopy, when measured without and with cycloplegia.
“This confirms the validity of the SVOne device in children, either as a starting point for the refractive sequence or as part of a vision screening paradigm,” the researchers said.
Disclosure: The researchers reported no relevant financial disclosures.