1. Presbyopia is a normal phenomenon
The age of onset of presbyopia is generally between 40 and 45 years old. In principle, presbyopia occurs in all people.
2. Presbyopia may occur even before the age of 40
Emotional problems such as mental stress and depression can lead to premature presbyopia.
3. Relevant age to wear reading glasses for reference
40 to 45 years old (without myopia, hyperopia or astigmatism), reading glasses with a degree of 100 to 150 degrees, replaced every 3 to 5 years, plus 50 degrees;
Around age 50 is about 200 degrees;
About 60 years old, about 300 degrees;
Generally, after the age of 60, there is no major change.