People who were given botulinum for migraines found coincidentally that phobia and dry eye symptoms improved as well.
Ophthalmology. 2018 Jan;125(1):139-140.
Botulinum Toxin A for the Treatment of Photophobia and Dry Eye.
Diel RJ et al
- 90 cases of chronic migraine being treated with botulinum
- not clear whether readings are pre or post headache photophobia readings but likely phtophobia with migraine
Results: photophobia dropped from 7.91 to 5.27/10 and dry eye from 5.4 to 4.68/10