Protecting Sight #97: How to use sonar to navigate the world. A must-see Ted Talk for ophthalmology colleagues. Rest in Peace Justice Ruth Bader Ginsburg. #RBG

Welcome to my daily learning journal. My daily goal is to watch one Ted Talk and one cataract surgery. I also plan to read one journal article and read/listen to a book chapter, short story or significant work.

Here’s today’s list:

1. Ted Talk – Daniel Kish – How I use sonar to navigate the world. “Daniel Kish has been blind since he was 13 months old, but has learned to “see” using a form of echolocation. He clicks his tongue and sends out flashes of sound that bounce off surfaces in the environment and return to him, helping him to construct an understanding of the space around him. In a rousing talk, Kish shows how this works — and asks us all to let go of our fear of the dark unknown.” (

This is a must-see for all ophthalmology colleagues. 13 minutes which includes a brief Q&A. Have a box of tissues handy. And prepare to be inspired.

2. Cataract Surgery – Uday Devgan MD Challenge: Monocular Dense Cataract. Dr. Devgan writes, “Operating on a monocular patient is always stressful since we know that the stakes are higher due to the patient having just this one eye with visual potential. It is also stressful for the patients, who often are so afraid of surgery that they delay procedures for years. That is the case here: the patient was so afraid of the potential risks of surgery that she waited for years until she presented with a dense white cataract with iris synechiae. Dr. Ali Al Beshri from Riyadh, Saudi Arabia does a great job helping this patient. He releases the synechiae and performs the double capsulorhexis technique to ensure a good outcome. The result is an outstanding outcome with a happy surgeon and an amazed patient.” Well done!

3. Journal – Duane A. Congenital Deficiency of Abduction, Associated With Impairment of Adduction, Retraction Movements, Contraction of the Palpebral Fissure and Oblique Movements of the EyeArch Ophthalmol. 1996;114(10):1255–1256. doi:10.1001/archopht.1996.01100140455017

The classic 1905 Duane’s Syndrome article!

Andrew Lee, MD with an excellent review of Duane’s Syndrome.
Dr. Connie Koklanis with an excellent review of Duane’s Syndrome.
Walt Whitman, steel engraving, July 1854.jpg

4. Book Chapter – Walt Whitman – Leaves of GrassSparknotesWikipedia, and Gutenberg. Books 16-17.

5. Rest in Peace Justice Ruth Bader Ginsburg. I have admired Justice Ginsburg since she stood with President Clinton in the White House Garden. A constant inspiration.

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