The term "2 eyesight" is not a standard medical term. It's likely you're asking about visual acuity, which is a measure of how well you can see. Visual acuity is typically measured using a Snellen chart, and 20/20 vision is considered normal.
20/20 vision means you can see clearly at 20 feet what a person with normal vision can see at 20 feet. Numbers lower than 20/20 indicate better than normal vision, while numbers higher than 20/20 indicate poorer vision.
Therefore, "2 eyesight" is not a standard term, and it's impossible to determine if it's bad or not without further clarification.
