Parametric Prescription Lens Inserts for Oculus Quest and Quest 2

thingiverse

This 3-file OpenSCAD project is a remix of the excellent "Oculus Quest Magnetic Prescription Lens Adapter" project by jegstad: https://www.thingiverse.com/thing:3659124/ Two of the three included files are unmodified from the version V2 of that project. The OpenSCAD code in this project sculpts, cuts, and pastes the "v2LensTopRight.stl" file to: Variably increase the thickness of the cavities for the prescription lenses (This is needed when applied with prescriptions for mid-to-strong farsightedness.) Optionally sculpt a lens retaining clip that can otherwise impinge on the nose Optionally output up to all four of the needed parts into a single STL In this project, left eye parts are automatically generated by mirroring the right eye parts. A primary goal of the project was to leave the excellent V2 base parts unmodified from jegstad's original design so that those bases can be easily used with lens-containing tops from this project. Unmodified bases are generated in OpenSCAD here, but only for user convenience. Typical usage: Install the latest version of the open source OpenSCAD package for your platform. Place all three files from this project into a single directory Open the file "Quest_Lens_Inserts.scad" in OpenSCAD. Be patient as it loads. From the OpenSCAD Customizer, disable nose torture. (Respect the Geneva Convention!) Set extra thickness appropriate for the prescription and refractive index of your lenses: Likely 0 mm for +1 diopter and lower, maybe 1.2 mmm for +2 diopters, and higher for higher. Select parts to print. You need all four for a complete set. Press F6 to render the result (be patient) and then F7 to output STL for use with your slicer. Assemble using 2x5mm disc magnets like these: https://www.amazon.com/gp/product/B07G75MPH4/ https://www.amazon.com/dp/B075PMRBWJ/ Be careful to select a uniform north-to-south pole orientation for the magnets in all parts. Magnets will near friction-fit to the bases, but it is nonetheless recommended to insert a drop of liquid super glue before pressing in. Magnets will insert loosely into the tops from their bottom sides, and this is appropriate given the variable thickness of the tops. Assemble on a non-stick surface (e.g. polyethylene bag), apply a generous drop of liquid super glue from the top, stir with a toothpick to facilitate capillary action to coat the sides of the magnet while in hole, add a small pinch of baking soda to facilitate rapid curing, and then add another drop of super glue and stir with the toothpick. This project is intended for use with circular lenses that are delivered in glasses ordered from Zenni Optical with this particular frame: https://www.zennioptical.com/p/metal-alloy-full-rim-frame-with-spring-hinges/5500 For either model of Quest, it is recommended to order for an IPD of 65 mm regardless of your actual IPD. This will near properly center the lenses as you use the Oculus IPD adjustment. Even more important is to order with an appropriate prescription. What you need is a single-vision prescription tuned for an operating distance of around 6 feet (1.8 meters) - but apparently Oculus does not as yet specify the exact design distance. As to lens options, antireflection coatings can very modestly increase VR contrast, but since the lens cavity thickness is parameterized in this project, there is typically less need to pay an impressive premium for modestly higher index of refraction. Note that the Zenni metal frame is offered in several surfaces (colors) at no increase in cost, and this can be useful if you are buying for folks with differing prescriptions in the same order. Please note that the frames have tiny Phillips screws that should be removed to release the lenses. In removing lenses, it is of course critical to transfer each lens into the insert for the appropriate eye. If the prescription corrects for astigmatism, it is just as critical that the lenses are placed at the same orientation (rotation) in the headset as they were in the glasses. Thus you should mark each lens before removal from the glasses to identify the proper orientation. You could use a small bit of adhesive tape to do this, but I use a Sharpie permanent marker. I mark a short black radial tick at the edge of the lens in line with the nose-bridge cross-piece of the glasses. This mark can then be aligned to the top-of-headset side of the small lens retaining clip at assembly. (That is the same clip that has its other side optionally sculpted by this project.) If upon installation, the tops do not seat flat to the bases because lenses in your inserts touch the convex surfaces of the Oculus lenses, you should to print new tops with added thickness. These parts print nicely in PLA without support on inexpensive FDM printers.