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Because .....feet?
Maybe they didn't get that far in their studies? Not enough time/budget?Since we're on the topic of fact vs. hearsay, the following are medically documented causes of photophobia:
- Achromatopsia
- Aniridia
- Aphakia (absence of the lens of the eye)
- Buphthalmos (abnormally narrow angle between the cornea and iris)
- Cataracts
- Cone dystrophy
- Congenital abnormalities of the eye
- Viral conjunctivitis ("pink eye")
- Corneal abrasion
- Corneal dystrophy
- Corneal ulcer
- Disruption of the corneal epithelium, such as that caused by a corneal foreign body or keratitis
- Ectopia lentis
- Endophthalmitis
- Eye trauma caused by disease, injury, or infection such as chalazion, episcleritis, glaucoma, keratoconus, or optic nerve hypoplasia
- Hydrophthalmos, or congenital glaucoma
- Iritis
- Optic neuritis
- Pupillary dilation (naturally or chemically induced)
- Retinal detachment
- Scarring of the cornea or sclera
- Uveitis
- Autism spectrum disorders
- Chiari malformation
- Dyslexia
- Encephalitis including Myalgic encephalomyelitis aka Chronic fatigue syndrome
- Meningitis
- Trigeminal disturbance causes central sensitization (hence, multiple other associated hypersensitivities. Causes can be bad bite, infected tooth, etc.
- Subarachnoid haemorrhage
- Tumor of the posterior cranial fossa
- Ankylosing spondylitis — Causes Uveitis as an extra-articular feature.
- Albinism
- Ariboflavinosis
- Benzodiazepines (long term use of or withdrawal from benzodiazepines)
- Chemotherapy
- Chikungunya
- Cystinosis
- Drug withdrawal
- Ehlers-Danlos syndrome
- Infectious mononucleosis (Glandular Fever)
- Influenza
- Magnesium deficiency
- Mercury poisoning
- Migraine
- Rabies
- Tyrosinemia type II, also known as "Richner-Hanhart syndrome"
You know what's not on that list? Wearing sunglasses as a kid...