Myopia-control contact lenses and methods relating thereto

A contact lens for use in preventing or slowing the development or progression of myopia, the lens including an optic zone comprising:

• a central region, the central region having a first optical axis and a curvature providing a base power and centred on a centre of curvature that is on the first optical axis;
• and
• an annular region having an add power, wherein the annular region surrounds the central region, is tilted relative to the central region, and comprises:
• at least one maximum add power meridian having a curvature providing a maximum add power and centred on a centre of curvature that is a first distance from the first optical axis;
• and
• at least one intermediate add power meridian having a curvature providing an intermediate add power of between zero dioptres of add power and the maximum add power and centred on a centre of curvature that is at a different distance from the optical axis than the first distance, wherein the add power of the annular region varies continuously between the at least one maximum add power meridian and the at least one intermediate add power meridian.