← Back to blog
technology · January 15, 2026 · AddOptics Team

Introducing Direct Final Lens Casting

How our revolutionary manufacturing process enables prescription-corrected AR lenses at scale

Direct Final Lens Casting manufacturing process

Introducing Direct Final Lens Casting

The challenge of creating prescription-corrected AR lenses has long been considered one of the hardest problems in smart glasses development. Traditional manufacturing methods force a trade-off between customization and scale. Until now.

The Problem with Traditional Manufacturing

Most AR glasses on the market today treat prescription correction as an afterthought. Companies either:

  • Skip prescription support entirely
  • Use clip-on adapters that add bulk and weight
  • Offer limited prescription ranges
  • Require months-long custom manufacturing processes

For the 4.2 billion people worldwide who need vision correction, this means smart glasses remain out of reach.

Enter Direct Final Lens Casting

Our proprietary Direct Final Lens Casting (DFLC) process fundamentally changes this equation. Here’s how it works:

1. Digital Design

We start with your optical design file. Any geometry. Any prescription. Freeform, aspheric, complex curves — our process handles it all.

2. 3D-Printed Molds

Using precision 3D printing, we create molds with micron-level accuracy. This gives us the design freedom of digital manufacturing with the optical quality of traditional processes.

3. Component Integration

Before casting, we position components — waveguides, sensors, electronics — directly in the mold. No adhesives. No bonding layers.

4. Single-Pour Casting

The lens is cast in one operation around the embedded components. Out comes a single, integrated structure with no air gaps, no delamination risk, and prescription correction built in.

The Results

The numbers speak for themselves:

  • ~400 microns: Final lens thickness
  • 10x faster: Compared to traditional manufacturing
  • Zero MOQ: From one prototype to thousands
  • 10 days: Lead time for custom optics

What This Means for the Industry

DFLC unlocks possibilities that were previously impossible:

  • Mass Customization: Every lens can be prescription-correct without sacrificing scale
  • Thinner Devices: Lenses thin enough for frames that look like regular glasses
  • Rapid Iteration: Prototype to production in weeks, not months
  • Lower Barriers: No massive tooling investments required

Looking Forward

We’re just getting started. Our Standard tier is shipping today. Advanced (single-function integration) is available now. And Vision (multi-function convergence) is in development.

The future of AR isn’t bulky goggles. It’s glasses that work for everyone.

Want to learn more about how DFLC could work for your product? Get in touch.

Back to blog