Wang Zhiquan nodded, "I have indeed been experiencing headaches, but I thought they were caused by my recent overexertion. Could it be related to my declining vision? I've been to the hospital for my eyes, and they told me it's just because I'm getting older and my eyes are getting blurry, so I can't see clearly, but they didn't say there was any disease in my eyes!"
"It's true that people of your age can develop presbyopia, but your symptoms aren't just presbyopia, you also have a problem with dimming vision, right? Your vision becomes very poor in the early morning, evening, and on overcast and rainy days, and you need strong light to barely make out objects, don't you?"
"Yes, that's indeed the case, but isn't that a symptom all elderly people have?"