Protecting Sight #308: What happens if you cut down all of a city’s trees? Dispersive vs. cohesive viscoelastics, intumescent cataracts, and VP shunts. The evolution & future of cataract surgery.

Welcome to my daily learning journal. Here is today’s list:

1. Ted Talk — Stefan Al: What happens if you cut down all of a city’s trees? “By 2050, it’s estimated that over 65% of the world will be living in cities. We may think of nature as being unconnected to our urban spaces, but trees have always been an essential part of successful cities. Humanity has been uncovering these arboreal benefits since the creation of our first cities thousands of years ago. So what makes trees so important to a city’s survival? Stefan Al explains. [Directed by Mette Ilene Holmriis, narrated by Addison Anderson, music by Bamm Bamm Wolfgang].” (

Ted-ED talks, often 5 minutes, are fast-paced and filled with insights.

2A. Cataract Surgery – Uday Devgan MD – Dispersive vs. Cohesive Viscoelastics. Great review.

2B. Dr. Neto Rosatelli. Phaco Clip #133 – Whitish Pre-Intumescent. Dr. Rosatelli writes, “Lukan Mishev’s custom digital filter for nGenuity is used in this whitish cataract case. Image digital processing can provide amazing visual aids and capabilities to the surgeon, and this is just a glimpse of what’s coming to digital microscopes.” Amazing indeed.

3. Andrew Lee MD – Ventriculoperitoneal shunt and patency (VP shunt)

Dr. Lee’s 450+ neuro-ophthalmology reviews are around 5 minutes each. Perfect for the busy clinician & trainee. I am watching from oldest to newest.

4. “The Evolution of Cataract Surgery.” – The Eye Tea Clubhouse group continues to host cutting edge and high yield learning sessions. Ophthalmology’s future is bright & I look forward to working with these colleagues in the years ahead.

5. Mom’s home cooking.

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