[Comparison of refraction with or without cycloplegia using Retinomax(®) or Plusoptix(®) devices].

PURPOSE: To evaluate the refraction in children measured with Plusoptix(®) without cycloplegia vs. Retinomax(®) apparatus with cycloplegia.

PATIENTS AND METHODS: Measure of refraction with Plusoptix(®) in children>1year old referred for systematic vision screening, then measurement after cycloplegia with cyclopentolate by the Retinomax(®) device.

RESULTS: Thirty-three children were included, i.e. 66eyes. Mean age was 40.7months (minimum 12; maximum 114). The Spearman correlation coefficient for the spherical equivalent was 0.52 (Plusoptix(®) vs. Retinomax(®) comparison; P<0.0001=moderate correlation). The Spearman correlation coefficient was 0.73 for astigmatism (Plusoptix(®) vs. Retinomax(®) comparison; P<0.0001=strong correlation). The Plusoptix(®) sensitivity for measurement of refraction was 57%, 43% and 43% respectively for spherical equivalent, sphere and astigmatism.

DISCUSSION AND CONCLUSION: The correlation of astigmatism values is strong, whereas the correlation of sphere values is moderate. Plusoptix(®) seems to be unable to measure the exact refraction, because there is too large a dispersion of refraction measurements with Plusoptix(®), compared to the exact refraction measured with the Retinomax(®). Moreover, the sensitivity of Plusoptix(®) is low. Cycloplegic refraction remains indispensable in children.