Protecting Sight #195: Can you solve the prisoner hat riddle? Anterior segment total reconstruction, POHS, & RVCL. Merry Christmas!

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, podcast, or significant work.

Here’s today’s list:

1. Ted Talk – Alex Gendler: Can you solve the prisoner hat riddle? “You and nine other individuals have been captured by super-intelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids eating highly logical and cooperative beings. Unfortunately, they’re not sure whether you qualify, so they decide to give you all a test. Can you solve this hat riddle? Alex Gendler shows how. [Directed by Artrake Studio, narrated by Addison Anderson, music by WORKPLAYWORK and Cem Misirlioglu].” (

I learned a great pearl here!

2. Cataract Surgery – Uday Devgan MD – anterior segment total reconstruction. Dr. Devgan writes in part, “This is a very complex case of a patient who had cataract surgery elsewhere and sustained complications during the procedure. An attempt at Yamane IOL fixation was made but the IOL was left dangling when the haptic dislocated from the optic and caused focal scleral thinning and leakage. The iris also sustained injury and the cornea was decompensating. The patient was referred to Steve Safran MD from New Jersey, USA who performed this total anterior segment reconstruction.” Excellent technique.

3. EyeNet (December 2020) Management of Presumed Ocular Histoplasmosis Syndrome. “A primer on presumed ocular histoplasmosis syndrome. What you need to know about this inflammatory, multifocal chorioretinal disorder with a controversial etiology.”

I love asking patients if they are from the Ohio River valley when I see histo spots in an sympotomatic patient.

4. Xie N, Yang J, Sun Q. Retinopathy With Multiple Cerebral Ring–Enhancing Lesions in a Young ManJAMA Ophthalmol. Published online December 17, 2020. doi:10.1001/jamaophthalmol.2020.4620

“A 35-year-old man presents 3 days after a 5-minute generalized tonic-clonic seizure with no other symptoms. He has had a 3-year history of hypertension and a painless decrease of vision over the last 6 years. He has unremarkable neurologic examination results; however, routine blood test results are significant for kidney insufficiency. What would you do next?”

JAMA Ophthalmology includes excellent clinical vignettes. Love the RVCL review!

Winner announced! My first book giveaway contest!

5. Congrats to the first recipient of my book giveaway. I hope you love Dr. Mackool’s Phaco Tips. Filled with surgical pearls. See the winner’s drawing on Instagram.

Merry Christmas & Happy New Year!

Leave a Reply