相機會折舊,眼睛同樣會;相機可以隨時替換,而眼卻只有一雙。究竟衰老過程會令眼睛出現什麼變化?老人家又是否一定視力差?坊間不時推介杞子及藍梅補眼,究竟有沒有科學根據呢? 歲月除了令人在臉上留痕,眼睛的感光細胞敏銳度亦會隨年歲遽增而滅弱。同樣看煙花,年青時見到色彩斑瓓,年老時見到的顏色,光暗對比都未必如年輕時敏銳。
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