A student in his 20s walked into an eye clinic in Edinburgh with six days of floaters and occasional flashes of light in his right eye. He had no eye disease beyond mild nearsightedness, no family history of retinal problems, and no memory of any blow to the head.
Then doctors looked at the back of his eyes. Both retinas were bruised and torn. The right eye had a retinal dialysis, a break at the far edge of the retina that clinicians normally associate with serious blunt trauma. The explanation surfaced only after a second round of questions. For about three months he had been pressing a high-frequency percussive massage gun onto and around both eyes, several minutes at a time, once a week, to relieve a feeling of tiredness.
An Injury Pattern That Usually Follows a Hard Blow to the Face
His vision was still 6/6 in both eyes, the metric equivalent of 20/20, which is part of what makes the case unsettling. Indented scleral examination told a different story. The right eye showed multiple retinal tears, widespread commotio retinae, or retinal bruising, and a retinal dialysis in the superior temporal periphery. The left eye showed commotio retinae plus six small horseshoe tears.
Retinal dialysis is a separation of the retina at the ora serrata, its outermost edge. Left untreated, it can progress to detachment and permanent sight loss. Doctors treated the tears in both eyes with laser and used barrier laser therapy to wall off the dialysis in the right eye.
At six months, the dialysis had not progressed, and no cataract had formed, according to the report published in BMJ Case Reports by ophthalmologists Niamh O'Connell and Ashraf Khan of the Princess Alexandra Eye Pavilion. His sight was preserved, the authors suggested, largely because he sought care soon after symptoms began.
The Device Came with No Warning He Noticed
The massage gun was bought commercially and used without professional guidance. The patient reported no awareness of any warning against using it on the eyes.
That gap matters more than it sounds. Percussive massage guns deliver rapid, concentrated pulses of force into soft tissue, and they are marketed for muscle recovery, not for anything above the neck. The authors noted that evidence on their safety is thin and that no standardized guidance exists, with recommendations varying among manufacturers, therapists and users.
These devices are consumer fitness products rather than regulated medical equipment, which means no central body reviews where on the body they can safely be applied. Research supporting them has focused on muscle soreness, flexibility, and recovery, all of it in tissue built to absorb force. The authors called this the first reported case of retinal dialysis with multiple bilateral retinal tears linked to percussive massage gun use, and wrote that the presentation "highlights the potential for significant retinal injury."
Where the Tear Sat Points Back at the Device
Retinal dialysis after trauma is usually explained by rapid compression of the eye from front to back, with the globe bulging at its equator. That deformation generates shearing forces at the vitreous base, where the retina is most firmly anchored.
Classic blunt-trauma dialysis tends to appear in predictable locations tied to how the orbital rim absorbs an impact. This one did not. The unusual superior temporal position, the authors suggested, may reflect force applied straight onto the front of the eye rather than transmitted around it, which is what happens when a percussive head is held against a closed lid.
Because this is a single case, the mechanism is an interpretation rather than a demonstrated fact. The authors ruled out the ordinary explanations, noting the patient had no high myopia, no prior eye surgery, and no genetic predisposition to retinal disease. In a statement issued with the report, they called for clear manufacturer warnings against improper application.
Cataracts, Glaucoma and Detachments Have All Been Reported Before
Ocular injuries from these devices are rare in the literature but not unprecedented. Earlier reports describe lens subluxation with secondary glaucoma, traumatic cataract, and retinal detachment after improper use.
One striking case appeared in the American Journal of Ophthalmology Case Reports. A 38-year-old woman with high myopia and fibromyalgia arrived at an emergency department describing a white film over her left eye. Her best corrected vision in that eye had fallen to 20/600. Examination found a dense posterior subcapsular cataract in a rosette pattern. She had spent the preceding weeks running a percussion massage gun over her left temple and the area around the eye, including directly over the globe, trying to relieve intractable headaches.
This summer, clinicians in China reported bilateral lens luxation with secondary glaucoma in a 62-year-old man who had applied a massage gun to his closed eyelids two or three times a day for three days to relieve dry eye. Reviewing the Edinburgh case, The Ophthalmologist noted that what distinguishes it is the combination of bilateral tears and dialysis alongside preserved vision. The lesson for consumers is not that massage guns are dangerous in ordinary use. It is that the eye is not muscle tissue, and the symptoms that followed here are the same ones ophthalmologists treat as urgent in anyone. New floaters, flashing lights, a curtain across the field of vision, or a sudden change in sight all warrant a same-day eye examination.
Key Questions Answered
What did the patient do?
For roughly three months, he used a high-frequency percussive massage gun on and directly against both eyes, several minutes at a time, about once a week, to relieve a feeling of tiredness.
What injuries did doctors find?
Multiple retinal tears and retinal bruising in both eyes, six small horseshoe tears in the left eye, and a retinal dialysis in the superior temporal periphery of the right eye.
Did he lose his vision?
No. His vision measured 6/6 in both eyes at presentation, and at six months after laser treatment, the retina remained stable with no cataract formation.
Is this a common risk of massage guns?
No. Published reports of eye injuries tied to these devices are rare, and this was described as the first case of retinal dialysis with multiple bilateral tears linked to one.
What symptoms should prompt an urgent eye exam?
New floaters, flashes of light, a shadow or curtain in the field of vision, or any sudden change in sight should be assessed promptly by an eye specialist.
