Use this virtual-reality calculation for a first-order display, optics, tracking, rendering, or latency estimate when all stages and units are explicitly defined.

Separation

Required number. Channel separation observed at the reference radius, in pixels.

Reference radius (px)

Required number in px. Radius at which the separation was measured; must be nonzero.

The cited overview of Distortion (optics) supplies background for the terminology and domain context used by this tool.^[1]

Compute the radial scale correction that removes measured color channel separation at a reference radius. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.

Scale correction

Returned number. Fraction of the radial distance to shift each channel inward.

• Lens calibration, per-eye geometry, display scanout, asynchronous pipelines, tracking filters, workload variation, user anatomy, and device firmware can make measured VR behavior differ from a serial model.
• Reference radius must be at least 0.
• Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.

Validate the estimate on the target headset with calibrated motion, optical, frame-timing, and latency measurements under a representative workload.

• Distortion Correction Factor Calculator

  Compute the per-pixel radial correction factor 1 + k1·r² + k2·r⁴ used to undistort headset lens output.

• IPD Adjustment Calculator

  Compute the lens separation offset between a user's interpupillary distance and the headset default.

• Lens Distortion K1 Calculator

  Solve the first radial distortion coefficient of r_d = r_u·(1 + k1·r_u²) from a measured sample.