Protecting Sight #101: Adjustable liquid-filled eyeglasses. Low rigidity in high myopes, a corneal melt in CIN, and Leaves of Grass.

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 Joshua Silver: Adjustable liquid-filled eyeglasses. “Josh Silver delivers his brilliantly simple solution for correcting vision at the lowest cost possible — adjustable, liquid-filled lenses. At TEDGlobal 2009, he demos his affordable eyeglasses and reveals his global plan to distribute them to a billion people in need by 2020.” (

Untreated refractive error (ie. the need for eyeglasses) is one of the most common causes of poor vision and blindness worldwide. This Ted Talk is from 2009 and Professor Silver had a bold goal for this year (2020). Hopefully one day the goal will be achieved … optimized vision for all worldwide.

2. Cataract Surgery – Richard Mackool MD – Episode 16: Intraoperative Aberrometry in a patient with low rigidity. Dr. Mackool writes, “This patient has a dense cataract, low ocular rigidity and unreliable preoperative biometry. The use of a high flow rate of 55 cc/min* to remove nuclear segments, wavefront aberrometry, and methods to prevent contact of the IOL with the endothelium during the late stages of the procedure are demonstrated.”

Great pearls. (Although Uday Devgan MD might cringe with that rhexis size! Dr. Mackool handles brilliantly).

Fig. 1

3. Journal – Corneal melt in conjunctival intraepithelial neoplasia. Warren N, Mercer R, Haddad J, et al. American Journal of Ophthalmology Case Reports, September 2020 (See also ONE Network Editors Choice post here.)

Walt Whitman, steel engraving, July 1854.jpg

4. Book Chapter – Walt Whitman – Leaves of GrassSparknotesWikipedia, and Gutenberg. Book 20.

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