How to do active focus? How does it feel? How can I …
https://www.quora.com/How-do-I-do-active-focus-How-does-it-feel-How-can-I-know-whether-I-am-doing-active-focus-or-just-straining-my-eyes-Use-simple-language
Answer (1 of 6): Active focus is very simple, all it takes is to challenge your eyesight at the edge of blur. The eye has the capability to detect that the image is out of focus and automatically will try to adjust to see clearer. Improvement takes time and patience, but not too much effort, as i...
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