原文开头
Taking a closer look Why do people scrunch up their eyes when they want to see more clearly? It seems to be counterintuitive. Gerard Buzolic Christchurch, New Zealand Scrunching up the eyes helps with focusing. As we get older, our ability to focus on near objects declines. Ciliary muscles squeeze and thin fibres holding the lens of the eye in its capsule relax and stop pulling the lens into the weak-lens, thin shape needed for distance vision. However, the lens, when not stretched at all, fails to relax into the strong-lens, fat shape that it once could. …
摘自《新科学家》(New Scientist)第3589期 · 2026年4月4日。仅引用开头一小段供了解文章,版权归原刊所有,全文请阅读原刊。