You cannot make assumptions about children by their diagnostic label. Abilities and individual needs may vary widely. Here is a list of various terms used to describe visual impairments. Ask parents what term they prefer to refer to their child's diagnosis or disability. A loss in visual acuity means a person can't see things clearly, or can't see details.
Visual field refers to the area that a person can see without moving the head.
Amblyopia, often called lazy eye, occurs when the image from one eye is suppressed as it travels to the brain. This patch may need to be worn for a few months or even a year, and sometimes glasses also are needed. Wearing an eye patch can be uncomfortable. Remember, the most important factor is keeping the patch on her eye. Avoid the practice of letting her take off the patch as a reward for wearing it for a period of time.