User interfaces for adjusting a tunable lens

An electronic device, comprising:

• a display configured to present an image through a masking layer with a ring of pinhole pairs;
• a tunable lens through which the display is viewable;
• and
• an input device configured to receive user input regarding a perceived image associated with the display and the masking layer.

A method of operating an electronic device with a display, a tunable lens that is aligned with the display, and a gaze detection sensor, the method comprising:

• using the display, presenting multiple targets associated with respective spherical powers;
• based on a point of gaze that is obtained using the gaze detection sensor, wherein the point of gaze is overlapping a target of the multiple targets, adjusting a spherical power of the tunable lens to have the respective spherical power of the target;
• receiving user input that identifies a preferred target of the multiple targets;
• and
• based on the user input, adjusting the spherical power of the tunable lens to have the respective spherical power of the preferred target.

A method of operating an electronic device with a display and a tunable lens that is aligned with the display, the method comprising:

• using the display, presenting a test chart that comprises multiple visual elements that connect to and extend radially outward from a common point;
• gradually changing a spherical power of the tunable lens;
• and
• based on user input, selecting an optimal spherical power for the tunable lens, an optimal cylindrical power for the tunable lens, and an optimal cylindrical axis for the tunable lens.