MisterKit

fastasleep said:

MisterKit said:

I don’t understand how a product like this will accommodate people with varying degrees of vision. I wear contact lenses for distance but use readers for up close vision. There is no way I could see something on a screen a half inch away from my pupil. I would need the readers or have to take out my contact lenses because I have pretty good nearsighted ability.

You don't focus a half inch away. You focus on things in the distance and the AR imagery appears as if it's, say a few meters in front of you along with whatever else you're looking at. Focusing a half inch away would cancel out the "reality" part of "augmented reality" as you'd basically be crosseyed. AR lenses use prisms and mirrors to project images from a microLED to your eyes.

Here's a good example product that is probably similar to what Apple is developing:

https://www.kura.tech

See section on "Novel Structured Geometric Waveguide Eyepiece":
https://www.kura.tech/technology

and the note on DOF at the bottom of the page:

Depth of Field: Typical AR headsets relay the image to one or two discrete focal planes. This results in what is called “accommodation-vergence mismatch” - for example, depth cues and parallax may suggest that a virtual object is six feet away, but the wearer’s eyes are need to focus 1 foot away to see a sharp image. Accommodation-vergence mismatch can lead to eyestrain and discomfort after prolonged periods of usage. A select few technologies (our’s and Letinar’s pin mirrors) have unlimited depth of field - the in-focus regions extends from a few centimeters in front of the wearer all the way to infinity.