Forget everything you know about smart glasses. A thumbnail-sized lens from a South Korean startup called LetinAR is about to make them actually wearable — and the tech world is paying attention.
The company just secured $18.5 million in fresh funding from Korea Development Bank and Lotte Ventures, setting itself up for a 2027 IPO. But here's the real headline: LetinAR doesn't make the glasses themselves — it makes the part that makes them actually work.
Co-founders Jaehyeok Kim (CEO) and Jeonghun Ha (CTO) spent a decade perfecting the optical module — the tiny lens component that projects images directly into your field of vision. A motorcycle rider zooming at 160 kilometers per hour sees directional arrows on the road ahead. No phone. No dashboard. Just the lens.
European roads are getting this tech as early as 2026.
Here's why every major tech player is moving fast: the optical module has to be light, thin, power-efficient, and deliver crystal-clear images — all while fitting inside a normal-looking frame. It's the hardest engineering challenge in the industry right now.
Samsung is already co-designing AI glasses with Gentle Monster (dropping at Galaxy Unpacked in London this July). Meta's been selling AI Ray-Bans since 2023. Google's building Android XR. Apple's coming. Huawei, Alibaba, Xiaomi — they're all moving.
AI glasses shipments hit 8.7 million units in 2025 — a 300% surge from 2024. Analysts project 15 million this year.
Even LG Electronics, LetinAR's original backer, is now developing its own AI smart glasses, a signal of how seriously South Korea's taking this market.
LetinAR's founders believe AI glasses are the next computing platform. They want to be the company every glasses maker calls when they need the optical core of their device.
This tiny Korean startup could become the backbone of the entire AI glasses revolution.
