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https://protectingsight.com/2021/01/09/protecting-sight-210-what-happens-in-your-brain-when-you-pay-attention-extended-depth-of-focus-vs-depth-of-field-vitreous-opacities-john-adams-courtship-of-abigail-smith/
Protecting Sight #210: What happens in your brain when you pay attention? Extended depth of focus vs. depth of field, & vitreous opacities. John Adams' courtship of Abigail Smith