Abstract: The invention relates to apparatus for measuring the curvature of curved objects such as a lens, and is particularly related to measuring the curvature of hydrophilic pliable contact lenses for use in ophalmology.The apparatus comprises an annular collar to support the lens being measured, a pointed contacting plunger means for guiding the latter, means for moving said plunger in relation to said support, electrical means to set up a difference in potential between the plunger and the lens support, the two latter being made of electrically conductive material, means for detecting the passage of electrical current between the plunger and the support, a measuring system, and an electronic processing assembly which receives the above signals and which is adapted to store the value of the measurement signal at the moment when the signal from the detecting means appears.