Protecting Sight #165: David Biello: How the compass unlocked the world. MSICS & Pseudoexfoliation (PXF). How COVID-19 impacts ophthalmology. The portraits of Leonardo.

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 – David Biello: How the compass unlocked the world. “‘Everything that we think of as world history would not have taken place without the compass.’ TED science curator David Biello explains how the device changed our relationship to the world.” (

The sub-4 minute Ted Talks (this one is 3:07) are often the most high yield and enjoyable.

2. Cataract Surgery – Uday Devgan MD – MSICS in Pseudo-Exfoliation. Dr. Devgan writes, “It is important to learn how to perform MSICS: manual small incision cataract surgery. This is a more evolved and refined way of performing manual extra-capsular cataract extraction (ECCE). The incision is much better because it is shelved with a good tunnel length and a trapezoidal configuration. The old ECCE incisions were made right at the limbus with corneo-scleral scissors and they sealed poorly and require many stitches. I have refined my way of performing MSICS by watching surgeons from India who have truly mastered this technique.” Nice case.

3. “COVID-19 Era Impacts on the American Academy of Ophthalmology.” Parke, David W. Ophthalmology, Volume 127, Issue 11, 1447 – 1450. An ophthalmology blue-print for future pandemics.

Portrait of a Man in Red Chalk (Wikipedia)

5. Book Chapter – Leonardo da Vinci by Walter Isaacson. Chapter 29, “Rome.” Excellent chapter includes analysis of the many portraits believed to be of Leonardo.

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