A design method of personalized progressive addition lenses is illustrated. The formula for determining the insets of progressive addition lenses is proposed based on the condition data of a lens-wearer and the prism effects of lenses. The condition data include the dioptric power of progressive lenses on a meridian line, the pupillary distance between both eyes for distance vision and the distance from the rotation centre of eyeball to the lens. The formula is induced to the design of the progressive addition lenses, and a design example is given. It shows that the insets of the center of the distance-vision zone and the near-vision zone are 0.5 mm and 3 mm,respectively. Compared with the symmetry design, the change of dioptric power is within 0.03 m-1 for the distance-vision zone and the near-vision zone. The symmetry of the dioptric power and the astigmatism of the progressive addition lens are retained on the distance-vision zone. The personalized design provides a pair of progressive addition lenses for lens-wearers through an adequate clear view for both eyes that can be obtained for various distance visions.