The most common cause of visual health impairment is uncorrected presbyopia, a progressive loss of near vision due to the reduction of elasticity of the crystalline eye. It affects 100% of the population aged over 45, people in their prime professional life. Progressive addition lenses are the most preferred solution to correct presbyopia, since they provide a better field of vision and more attractive lenses. Currently, the personalization of progressive lenses is done by establishing the position of the geometric center of the pupil with respect to the users’ glasses, which is based on assumptions and standard values. Real personalization is required to eliminate visual distortion, aberrations and the long adaptation times of progressive lenses users. At Lentitech, we have developed ErgoFocus, a system to design 100% personalized progressive lenses based on clinical measurements of the user´s facial and optical parameters.