ABSTRACT Objective: To compare refractive measurements obtained with the QuickSee Free™ (QSFree) wavefront autorefractor, with and without a +2.00 D fogging lens, against subjective clinical refractometry (SCR) under cycloplegia in schoolchildren aged 7 to 17 years. Methods: One hundred right eyes from 100 healthy Brazilian schoolchildren were evaluated using QSFree without cycloplegia, QSFree with a +2.00 D fogging lens, QSFree under cycloplegia, and SCR under cycloplegia. Refractions were converted into spherical equivalent (SE) and astigmatic vector components projected onto the […]

ABSTRACT Objective: To study vertex-optical distance variation and estimate its impact on manifest refraction. Methods: Prospective study in a private clinic using the Vision-S™ 700 with five forehead positions. Forehead on the third position showed the closest vertex-optical distance of 12mm. Results: Analysis of 52 eyes from 26 patients revealed mean differences in vertex-optical distance of 12.25mm (right eye) and 11.75mm (left eye). A 2mm change in vertex-optical distance resulted in a 0.05D change for a 5D spherical equivalent and […]