I saw one in a documentary. TWO documentaries!!
Presbyopia comes from the same root as Presbyterian. The Presby part meaning “old men” because Presbyterians are governed by the elders of the church. And Presbyopia is “old men eyesight.”
Presbyopia
Makes it difficult to see things up close. This condition occurs when the eye’s lens hardens and the focusing muscle weakens, making it harder to focus on nearby objects. Presbyopia typically develops around age 40.
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Farmers use GPS. Unfortunately, solar storms affect their GPS’es:
I believe the plural is GPI.
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