Selfie video recording of nystagmus Written by Deepseek AI on 08-02-2026

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Why Record a Selfie Video of Nystagmus?

Nystagmus is a condition characterised by rhythmic, involuntary oscillations of the eyes. These movements may be horizontal, vertical, torsional, or mixed. Recording a selfie video of nystagmus serves multiple purposes. It provides a time-stamped record of episodes, helps clinicians observe eye movement patterns that may not be present during an office visit, and allows patients to track changes over time. For individuals with intermittent or positional nystagmus, a smartphone video captured at home can be more valuable than an in-clinic examination.

Understanding the Basics of Nystagmus Recording

A selfie video uses the front-facing camera of a smartphone to capture the subject's face and eyes. The goal is to obtain a clear, well-lit, and stable recording that shows both eyes in sufficient detail to identify the slow and fast phases of nystagmus. The video should include the entire face, but the eyes must be large enough in the frame for the movement to be visible. Most modern smartphones offer adequate resolution, but the quality of the lighting and positioning are often more critical than the camera specification.

How to Record a Selfie Video of Nystagmus

  1. Choose the right environment: Use a room with even, diffuse lighting. Avoid bright backlighting or direct sunlight, which can cause the pupils to be too small and the iris detail to be lost. Light from a window at a 45-degree angle to the face often works well.
  2. Position the phone correctly: Hold the phone at eye level, approximately 30 to 40 centimetres from the face. The front camera should be directly facing you, not tilted. Your eyes should appear in the centre of the frame, with a small margin of forehead and chin visible.
  3. Stabilise the phone: Rest your elbows on a table or hold the phone with both hands. Shaking makes it difficult to distinguish eye movement from camera movement. A tripod or a stack of books can be used for even greater stability.
  4. Perform the specific movement or gaze positions: If the nystagmus is triggered by certain head positions or gaze directions, record multiple short clips. Look straight ahead for ten seconds, then to the right and left, then up and down. Also try tilting your head forward, backward, or toward each shoulder. Label the videos or say the condition aloud at the start of each recording.
  5. Record the relaxed gaze first: Start with your eyes in a neutral, relaxed position. Then move your eyes to each target gaze, spending at least five seconds per position. Keep your head still and only move your eyes unless you are documenting positional nystagmus.
  6. Cover one eye at a time: Some forms of nystagmus are more visible when one eye is covered. Use an eye patch or your hand to cover one eye for a few seconds, then switch. Be careful not to press on the eye itself.
  7. Include a fixation target: To test for gaze-evoked nystagmus, hold a small pen or your finger slightly to one side and look at it without moving your head. This helps reveal nystagmus that may be suppressed during straight-ahead viewing.

Optimising Video Quality

Use the highest available frame rate and resolution settings on your phone. Many phones record at 1080p or 4K and 30 or 60 frames per second. For fast nystagmus, 60 fps reduces motion blur. Set the focus and exposure by tapping your face on the screen before recording. Some phones allow manual exposure lock, which prevents brightness changes when the eyes move under a shadow. A hairband or cap can keep hair away from your eyes, and removing glasses may improve visibility. Contact lenses generally do not need to be removed unless they are tinted or cause reflections.

What to Do with the Recordings

Store the video clips in a clearly named folder with the date, time, and the condition under which they were recorded. Compress or share them via a secure method if sending to a healthcare provider. Many telemedicine platforms accept video uploads. If you are recording for your own monitoring, keep a written log of symptoms that accompany the nystagmus, such as dizziness, vertigo, headache, or blurred vision. This contextual information is often more useful than the raw video alone.

Limitations of Selfie Recording

Selfie video cannot capture certain critical features. Pupil size, retinal vessels, and the exact angle of the eyes are difficult to assess. Fine torsional nystagmus may be missed by a standard front camera. Ambient lighting can cause changes in pupil size which influence nystagmus, especially in cases related to light sensitivity. Also, a patient who is experiencing severe vertigo may not be able to hold the phone steady or follow instructions. In such cases, have a family member or friend assist with the recording.

When to Seek Professional Assessment

Selfie video recording is not a diagnostic tool. A properly trained clinician can use a video goggles system, electro-oculography, or an infrared eye tracker to measure eye movements with greater precision. The selfie recording should be considered a supplement to, not a replacement for, clinical evaluation. If you notice new nystagmus that lasts more than a few minutes, or if it is accompanied by double vision, weakness, difficulty speaking, or sudden hearing loss, seek urgent medical attention.

Selfie video recording of nystagmus