1. If we wear the glasses, we can see through the lens?
>> Yes, of course, the lens is made of Acrylic, we have the vision(except the white square of the lens).
2. Will the glasses fit for big face(head)?
>> Yes, the width of the frame is 158mm, is width enough for wide head.
3. If it comfortable when we wear?
>> Yes, the frame is light and flexible with nose pad, not oppress nose bridge, make you more stable and more comfortable.