Multi-focal optics for wearable heads-up displays

A lens assembly comprising:

• a first lens portion, the first lens portion including a first region having a first optical power, a second region having a second optical power different from the first optical power, and a transition region between the first region and the second region, wherein an optical power of the transition region transitions between the first optical power and the second optical power over the transition region;
• a second lens portion;
• and
• a light guide positioned between the first lens portion and the second lens portion, the light guide having an output eyebox positioned outside of the transition region such that the output eyebox does not pass through the transition region.

A wearable display device comprising:

• a light engine carried by a support structure, the light engine to output display light;
• an eye-side lens portion carried by the support structure to be positioned proximal to an eye of a user when the support structure is worn on a head of the user;
• a world-side lens portion carried by the support structure to be positioned distal from the eye of the user when the support structure is worn on the head of the user, the world-side lens portion including a first region having a first optical power, a second region having a second optical power different from the first optical power, and a transition region between the first region and the second region, wherein an optical power of the transition region transitions between the first optical power and the second optical power over the transition region;
• and
• an optical redirector positioned on the support structure, the optical redirector to receive display light from the light engine and redirect display light towards the eye of the user through the eye-side lens portion and outside of the transition region of the world-side lens portion such that the display light does not pass through the transition region when the support structure is worn on the head of the user.