OBJECTIVE: Evaluate induced astigmatism in progressive addition lenses into deflectometer measurements. METHODS: Eleven progressive addition lenses were included with power away from +1.00D and addition 2.00D. Induced astigmatism was assessed twelve points in the zone intermediate, with six on each side of the progressive corridor in deflectometer. RESULTS: There are significant differences between the sums of induced astigmatism on each side of the corridor and in the general in progressive addition lenses studied, with coefficient of variation with strong dispersion (CV 10-13%). CONCLUSION: There is an important variation of the power of induced astigmatism in progressive addition lenses.
Refraction; ophthalmic lens; Progressive addition lenses; Optics; Presbyopia; Equipment and supplies; Brazil
