Central retinal artery occlusion, nystagmus, Wallenberg syndrome, ophthalmoplegia, Horner syndrome, loss of vision, diplopia, and ptosis are all amongst the eye-related problems that have been associated with chiropractic upper spinal manipulations. Often the damage leaves a permanent deficit – happily, not in this instance.
US ophthalmologists published the case of a 59-year-old Caucasian female who presented with the acute, painless constant appearance of three spots in her vision immediately after a chiropractor performed cervical spinal manipulation using the high-velocity, low-amplitude technique. The patient described the spots as “tadpoles” that were constantly present in her vision. She noted the first spot while driving home immediately following a chiropractor neck adjustment, and became more aware that there were two additional spots the following day.
Slit lamp examination of the right eye demonstrated multiple unilateral pre-retinal haemorrhages with three present inferiorly along with a haemorrhage over the optic nerve and a shallow, incomplete posterior vitreous detachment. Optical Coherence Tomography (OCT) demonstrated the pre-retinal location of the haemorrhage.
These haemorrhages resolved within two months.
The specialists concluded that chiropractor neck manipulation has previously been reported leading to complications related to the carotid artery and arterial plaques. This presents the first case of multiple unilateral pre-retinal haemorrhages immediately following chiropractic neck manipulation. This suggests that chiropractor spinal adjustment can not only affect the carotid artery, but also could lead to pre-retinal haemorrhages.
In the discussion section of their paper, the authors stated: Upper spinal manipulation with the HVLA technique involves high velocity, low-amplitude thrusts on the cervical spine administered posteriorly. No other aetiology of the pre-retinal haemorrhages was found on work-up (no leukemic retinopathy, hypertension, diabetes, or retinal tear). The temporal association immediately while driving home from the chiropractic procedure makes other causes less likely, although we cannot exclude Valsalva retinopathy or progressive posterior vitreous detachment. Given the lack of any retinal vessel abnormalities or plaques along with the temporal association, we postulate that the chiropractor neck manipulation itself induced vitreo-retinal traction that likely led to pre-retinal haemorrhages which were self-limited. It is also possible that the HVLA technique could have mechanically assisted with induction of a posterior vitreous detachment.
If the authors are correct, one has to wonder: how often do such problems occur in patients who simply do not bother to report them, or doctors who do not correctly diagnose them?