**Lenses** ========== .. py:currentmodule:: symplyphysics.optics.geometrical_optics.lenses **Contents:** .. toctree:: :maxdepth: 4 optics.geometrical_optics.lenses.lens_focus_from_object_and_image optics.geometrical_optics.lenses.linear_magnification_from_distance_to_object_and_distance_to_image optics.geometrical_optics.lenses.linear_magnification_from_object_height_and_image_height optics.geometrical_optics.lenses.optical_power_from_focus_distance optics.geometrical_optics.lenses.optical_power_from_thin_lens_radius optics.geometrical_optics.lenses.optical_power_of_spherical_lens_from_refractive_indices_and_distances