Eyepiece - binoculars are a perfect combination of glasses and binoculars. You can easily admire, for example, views on a trip, bird watching, hands-free. They are also ideal for seniors with low vision. The glasses have adjustable focus. The maximum magnification is 400% ( 4x magnification). It is also perfect for watching TV, working on the computer or reading books. Perfectly enhances the close-up view (for reading, sewing, etc.) for people with visual impairments (cannot see clearly up close); For people who are short sighted and people without vision defects, they are perfect as binoculars!