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What Symptoms Are Most Common in Superior Oblique Myokymia?

In a clinical cohort, 30 of 35 patients (85.7%) reported visual disturbances, such as double vision or the sense that surroundings are moving, making these the most commonly reported superior oblique myokymia (SOM) symptoms. A total of 22 patients (62.9%) reported eye twitching, while 15 (42.9%) reported dizziness or difficulty with balance. These categories can overlap, so the percentages describe this patient group rather than rates for everyone with SOM.

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What Symptoms Are Most Common in Superior Oblique Myokymia?

In a clinical cohort, 30 of 35 patients (85.7%) reported visual disturbances, such as double vision or the sense that surroundings are moving, making these the most commonly reported superior oblique myokymia (SOM) symptoms. A total of 22 patients (62.9%) reported eye twitching, while 15 (42.9%) reported dizziness or difficulty with balance. These categories can overlap, so the percentages describe this patient group rather than rates for everyone with SOM.

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Which Visual Symptoms Are Linked to SOM?

SOM symptoms commonly include double vision and oscillopsia, the sensation that the visual scene is moving. Across the 116 published cases, patients reported these among their main visual symptoms; patients in the 2026 clinical cohort also reported blurred vision and reading impairment. These reports describe symptom types but do not establish how often each occurs in the wider population.

Why Can SOM Make Vision Seem to Shake?

SOM can make vision seem to shake because the affected eye undergoes tiny, rapid involuntary movements. Measurements from 3 patients showed peak-to-peak torsional and vertical movement amplitudes under 1 degree, while peak speeds often exceeded 4 degrees per second. Irregular movements reached about 50 Hz, alongside larger oscillations ranging from 1.5 to 6 Hz. These measurements describe the patients in that series, not the full range of movements possible in SOM.

Can SOM Cause Symptoms Beyond Visual Changes?

Yes, SOM can involve symptoms beyond visual changes. The clinical cohort's symptom categories separate noticeable eye twitching from visual symptoms, while dizziness or gait instability falls under vestibular-postural symptoms. Earlier cases also involved involuntary eye movements with brief vertical or twisting double vision. The symptom categories can overlap, so readers should not interpret them as mutually exclusive groups.

Do All People With SOM Report the Same Symptoms?

No, people with SOM can report different combinations of visual disturbances, eye twitching, and dizziness or balance problems. Some mainly notice involuntary eye movements, sometimes alongside dizziness or gait instability. These symptom proportions come from 35 patients, so they describe that group rather than everyone with SOM. Earlier patients also experienced intermittent abnormal eye movements rather than a single constant symptom pattern.

Learn More About Superior Oblique Myokymia Symptoms

What does oscillopsia feel like?

Oscillopsia is the sense that the visual scene is moving or shaking even when it should appear still. In the 2026 clinical cohort, 30 of 35 patients (85.7%) reported visual-perceptual symptoms, including oscillopsia or double vision.

Can SOM cause dizziness or balance problems?

Yes. In the initial clinical cohort, 15 of 35 patients (42.9%) reported dizziness or gait instability. In a separate follow-up questionnaire group of 13 patients, 7 (53.8%) reported gait instability and 6 (46.2%) reported dizziness. These figures come from different patient groups, so do not compare them as though they measure the same sample.

Can you notice SOM as eye twitching rather than a visual disturbance?

Yes. In the initial clinical cohort, 22 of 35 patients (62.9%) reported noticeable eye twitching; some patients described eye movements without a subjective visual disturbance.

When to See Your Doctor

Arrange an eye exam for recurring double vision, visual shaking, or unusual eye movements, especially when symptoms interfere with reading or daily activities. An ophthalmologist may assess the eye movements and, when the cause is unclear or you need further neurological assessment, refer to a neuro-ophthalmologist or neurologist.

References

Archives of Ophthalmology. Superior Oblique Myokymia: Quantitative Characteristics of the Eye Movements in Three Patients. https://doi.org/10.1001/archopht.1991.01080120094034. Published December 1, 1991. Accessed October 22, 2026.

Archives of Ophthalmology. Superior Oblique Myokymia: Report and Discussion on Five Cases of Benign Intermittent Uniocular Microtremor. https://doi.org/10.1001/archopht.1970.00990040463011. Published October 1, 1970. Accessed October 22, 2026.

Journal of Neurology. Superior oblique myokymia: diagnostic criteria and long-term outcome. https://doi.org/10.1007/s00415-026-13773-6. Published April 1, 2026. Accessed October 22, 2026.

Practical Neurology. Superior oblique myokymia. https://doi.org/10.1136/practneurol-2018-001967. Published online July 30, 2018. Accessed October 22, 2026.

Survey of Ophthalmology. Superior oblique myokymia. https://doi.org/10.1016/j.survophthal.2017.10.005. Published July?August 2018. Accessed October 22, 2026.