John Q on X: "@HillaryClinton wears glasses for people who have traumatic brain injury, known as a Fresnel prism. #HillarysHealth https://t.co/U2DwHkFk1b" / X
![Hillary Clinton: Does Secretary of State have double vision after blood clot scare? | Daily Mail Online Hillary Clinton: Does Secretary of State have double vision after blood clot scare? | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2013/01/25/article-2268073-1726CCEB000005DC-523_1024x615_large.jpg)
Hillary Clinton: Does Secretary of State have double vision after blood clot scare? | Daily Mail Online
![PDF] Application of Fresnel Prism in the Complex Treatment of Friendly Strabismus | Semantic Scholar PDF] Application of Fresnel Prism in the Complex Treatment of Friendly Strabismus | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/5312262c4e094688433ddddaeec93c9518eec678/3-Figure1-1.png)