Abstract

BETANCOURT, Carolina; DELATORRE B, Alejandro  and  PINEROS, Óscar. PRECISSION OF OBJECTIVE REFRACTION BY WAVEFRONT COMPARED TO SUBJECTIVE REFRACTION TAKEN AS A TEST OF GOLD. Investig. andina [online]. 2009, vol.11, n.19, pp.66-80. ISSN 0124-8146.

Introduction: subjective refraction is used as a test of gold. It incorporates the patient's neurosensory participation in order to define the best corrected vision. Methods: the objective of this work is to analyze the differences of the data obtained from comparing subjective refraction versus objective refraction measured through aberration maps by wavefront (wave length) by means of vectors and statistical analysis. Results: 156 eyes with subjective and objective refraction were evaluated ORK (wavefront Schwind: instrument that analyzes all the optical aberrations that reach the eye), and the differences that were found in near-sighted, long-sighted, astigmatism, hypermetropy and near-sighted astigmatisms were less than 0.50 diopters (70%) with a variance in the axis of up to 25 degrees. Conclusion: significant average differences were found between the subjective refraction taken as a test of gold and the COAS (objective measuring unit guided by wave lengths) defined as objective refraction. In spite of finding differences of less than 0.50 diopters, it is of great clinical importance at the time of adapting a pair of glasses, contact lenses and/or program refractive surgery.

Keywords : evaluation studies; optometry; hyperopia; refraction errors; ophthalmological diagnostically techniques.

        · abstract in Spanish | Portuguese     · text in Spanish     · Spanish ( pdf )