Seeing is an active skill, not a passive default of having functioning eyes
Elkins's foundational argument is that having eyes and technically seeing something are very different from actually perceiving its structure, history, or meaning. Most people move through the visual world in a kind of efficient triage mode, extracting just enough information to navigate and identify objects without lingering on their details, which is perfectly functional for daily life but leaves almost everything about those objects permanently unnoticed. He treats close, sustained looking as a learnable capacity that atrophies through disuse in the same way any other skill would, and argues that the difference between casual glancing and genuine seeing is less about visual acuity and more about willingness to slow down and about knowing what specifically to look for in a given kind of object. This reframes attentiveness itself as the primary obstacle, not any lack of natural visual talent. Takeaway: most of what surrounds you is technically visible but functionally invisible, simply because no one has taught you to actually look at it.