Lensmeter and method for determining optical characteristics of spectacle lenses

The present invention provides a lensmeter and a method for determining optical characteristics of spectacle lenses, which can easily obtain at least one of the optical characteristics of the spectacle lenses and an interocular distance with high precision, and the method for determining the optical characteristics of the spectacle lenses uses the lensmeter and calculation program. The lensmeter comprises a pair of left and right measurement optical systems for measuring each of the left and right spectacle lenses arranged on a pair of left and right arrangement portions which are arranged to be capable of respectively arranging the left and right spectacle lenses of spectacles, and a control portion calculating the optical characteristics on basis of measurement results of the spectacle lenses which are obtained by measurement, and the control portion, on basis of the calculated optical characteristics, calculates offset of an optical center of the spectacle lenses by using an optical axis of the measurement