Leonardo da Vinci may have had eye disorder

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A new study suggests Leonardo da Vinci may have had an eye disorder that helped him paint.

According to Science News, visual neuroscientist Christopher Tyler of the City University of London looked at six pieces of art thought to be modeled after da Vinci, and published the results on October 18 in Jama Ophthalmology.
According to the Washington Post, Tyler looked at two sculptures, two oil paintings and two drawings and conducted mathematical analyses to conclude that da Vinci had "an exotropic tendency of approximately -10.3 degrees when relaxed.
Five of the works show an eye misalignment consistent with the eye disorder exotropia that can affect three-dimensional vision. This led Tyler to believe that da Vinci may have had intermittent exotropia.
Exotropia is a type of strabismus where one eye turns slightly outward and can be treated with special glasses, eye patches or surgery.
If da Vinci was able to control his exotropia, Tyler believes it may have given the painter an artistic advantage by allowing him to switch back and forth from seeing in three dimensions and two dimensions.
RUNDOWN SHOWS:
1. David statue by del Verrochio shows da Vinci with exotropia
2. Six pieces modeled after da Vinci showed five with exotropia
3. Exotropia is a type of strabismus and can be treated with glasses, eye patches or surgery
4. Da Vinci may have had ability to switch from seeing in 3D to 2D

VOICEOVER (in English):
"A new study suggests Leonardo da Vinci may have had exotropia, where one eye turns slightly outward, which may have affected three-dimensional vision that helped him paint."

"According to Science News, visual neuroscientist Christopher Tyler of the City University of London looked at six pieces of art thought to be modeled after da Vinci.
Five of the works show an eye misalignment consistent with exotropia, leading Tyler to think da Vinci may have had intermittent exotropia."

"Exotropia is a type of strabismus where one eye turns slightly outward and can be treated with special glasses, eye patches or surgery."

"If da Vinci was able to control his exotropia, Tyler believes it may have given the painter an artistic advantage by allowing him to switch back and forth from seeing in three dimensions and two dimensions."
SOURCES: Science News, Washington Post
https://www.sciencenews.org/article/eye-disorder-exotropia-leonardo-da-vinci-artistic-edge?tgt=nr
https://www.washingtonpost.com/news/morning-mix/wp/2018/10/19/leonardo-da-vincis-genius-may-be-rooted-in-a-common-eye-disorder-new-study-says/?noredirect=on&utm_term=.3daa67044f6b