SteamOS 0.4.3 is now available for Steam Frame’s Beta channel, adding a single-eye tracking accessibility option and battery-life gains of up to 12%, Valve said on Thursday (1 October 2026).
The update includes features still being tested. Valve says it has improved power efficiency and battery life during both streaming and local gameplay, but notes that results vary depending on framerate and content.
The new accessibility setting lets users limit eye tracking to a single eye. The option, labelled “Track Dominant Eye Only”, sits under VR Settings > General and requires users to enable “show advanced settings”.
The update also brings further VR streaming reliability improvements, including additional fixes for “Error 17” connection issues. To reduce those issues, users must also opt into SteamVR 2.18.2 or later on their PC. Valve said SteamVR 2.18.2 was available on the SteamVR beta branch at the time of the release.
Google Earth VR and Thumper are among the games affected by a controller-binding bug fixed in this update. Other fixes address wireless adapter connections in some countries, while Valve has also improved focus behaviour around grab and resize handles.
The OS release includes SteamVR 2.18.2. Users can opt into the Steam Frame Beta channel through Settings > System > System Update Channel.