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Sorry about that. Problems of the aged that thwart detailed work by the elderly the most:
- hand tremors https://health.clevelandclinic.org/are-you-bound-to-get-shaky-ands-as-you-age/
- macular degeneration (https://www.nei.nih.gov/learn-about-eye-health/eye-conditions-and-diseases/age-related-macular-degeneration)
- Eye focus problems from lens stiffness, eye shape (lenses and lighting will aid)
- Cataracts (very common) : https://www.mayoclinic.org/tests-procedures/cataract-surgery/about/pac-20384765
- SUGAR LEVEL affecting vision clarity FROM pre-Diabetes 2 !!!!! Number one cause, many stages!!!! curable with glipazide, metaformin, or a dozen better newer cheap out-of-patent pharmaceuticals ! https://www.healthline.com/health/diabetes/diabetic-retinopathy-stages
- Disenchantment of desire to finish large projects : due to loss of prior convalescent or dead peers and old friends who appreciated complex projects, and of course rotten jaded spoiled UNGRATEFUL grand kids, whom all profess to hate ever wearing even non-patterned artisanal sweaters.

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I am not commenting on your case medically. I am only typing here as entertainment.

THE ABOVE REMARKS ARE NOT A MEDICAL DIAGNOSIS BY ME, NO MATTER HOW I PRESENTED THE MATERIAL. My post is not meant to be prime evidence in a "Your Medical License is Being Revoked" Board of Medicine initiated letter. My words are merely entertainment to an anonymous healthy person I never physically met.

That's a good approach. The link was to an invidious version of the youtube video so it was fine. Using a VPN addresses the IP concerns.