Larry Alexander, OD FAAO (1947 - 2016)


My heart is broken hearing of Larry's passing. Anyone who knew Larry was a better person for it. Last week Larry asked me to remove EyeLessons in its entirety so I reluctantly took it down. He also told me I could do with it whatever I want with it, so I'm putting it back up so others can enjoy Larry's style of education for a little longer.  EyeLessons was a labor of love, and I was constantly amazed at the content output by one of Optometry's leading educators.

Larry, I will miss you. It was an honor working with you and calling you a friend.

-Adam Parker, OD
(the guy behind the scenes of EyeLessons)

posted April 18, 2016

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Articles tagged with: Glaucoma

Macular Ganglion Cell Loss In Ocular Disorders

The Structure/Function Conundrum

Macular Ganglion Cell Loss In Ocular Disorders

- Glaucoma is a neurodegenerative disease causing the loss of retinal ganglion cells
- Ganglion cell numbers range from approximately .7 million to 1.5 million
- Density is greatest in the macula where the ganglion cell layer can be 6 cells deep
- The thinnest and densest layer of ganglion cells is in a 1 to 1.5 mm radius of the fovea

Ocular Manifestations Of Sleep Apnea

Ocular Manifestations Of Sleep Apnea

Sleep apnea is a systemic disorder in which breathing repeatedly stops and starts during sleep, usually with 10 to 60 second interruptions. “Apnea” is Greek for “without breath.” Each pause in breathing is an “apnea”, and each low breathing event is referred to as a hypopnea. When oxygen saturation in the blood drops below a critical level, the brain signals the body to “wake up” and take a deep breath, thus preventing deep sleep. While seemingly innocuous and more annoying to the bed partner than the patient (the sufferer is almost never aware during sleep), sleep apnea represents a genuine threat to both systemic and ocular health because of the associated compromise of oxygen flow to end organs.

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