Steam Frame Adapter for VR Optician Valve Index Prescription Lenses (PLA/PETG)

Use your existing Valve Index prescription lenses from VR Optician in the Valve Steam Frame. Take the lenses out of their Index holders, put them into this adapter and clip it onto the Frame’s lens module.

This is the rigid version of my TPU adapter, for people who print in PETG or PLA.

Made for VR Optician lenses. The lens contour, edge thickness and orientation were measured on VR Optician Index inserts. Lenses from other makers may have a different shape and won’t fit without changes.

How it works

• The clamp is shaped after Valve’s official CAD of the Steam Frame lens module. Twelve small crush ribs hold it firmly on the module without slots or flexing fingers.

• The lens sits in a groove whose height follows the measured edge thickness of the lens all the way around, so it has no play.

• A flat C-shaped retainer ring holds the lens from the eye side. Bend it slightly, slide it under the four small noses on the adapter and let go. To remove it, push one end inward.

• The eye-tracking sensors on the nose side and the straight edge of the lens stay uncovered.

• The lens is rotated to match the tilted Frame lenses, so the cylinder axis of your prescription stays correct.

Printing

• PETG (preferred) or PLA, 0.2 mm layers, 4 perimeters, 20–25 % infill

• No supports. The files are already in print orientation, with the eye side on the bed.

• Print one left and one right adapter, plus a left and a right retainer.

Test files (optional)

• clamp_test_left_print: only the clamp, to check the fit on the lens module.

• fit_test_ring_left_print + fit_test_retainer_left_print: only the lens seat and retainer, to check the lens fit.

Fitting

1. Put the lens into the adapter from the eye side.

2. Insert the retainer under the noses.

3. Press the adapter straight onto the Frame’s lens module until it sits flat.

The lens ends up about 1 mm in front of the Frame lens.

Credits & License

• Outer contour and lens-module outline derived from Steam Frame Lens Protector (TPU) by Jonathan Mayer

• Clamp geometry and eye-tracking sensor position derived from Valve’s official Steam Frame Core Module CAD files, © Valve Corporation.

Both sources were modified: I extracted cross-sections and contours and built a new adapter around them. This model is shared under CC BY-NC-SA 4.0. Not affiliated with or endorsed by Valve, Jonathan Mayer or VR Optician.

Disclaimer
Use at your own risk. Check that nothing touches the Frame lenses, and stop using the adapter if your vision feels off.