three.js/examples/jsm/effects/StereoEffect.d.ts

import {
  Camera,
  Scene,
  WebGLRenderer
} from '../../../src/Three';

export class StereoEffect {
  constructor(renderer: WebGLRenderer);

  setEyeSeparation(eyeSep: number): void;
  render(scene: Scene, camera: Camera): void;
  setSize(width: number, height: number): void;
}