Eye Doctor Told to Not Lift Weights

[TheSheed]

Eye doctor told me to not lift weights because in my left eye, I have -2 myopia and astigmatism. She did not explain what exercises to do, basically she told me to not lift anything heavier than 10 pounds (even that only sitting and laying down). She said running is okay but running does not build muscle. My goal is muscle building

Any advice, what to do?
Can I lift weights?
How can I build muscle?
What form of exercise to do for muscle building in this situation?

P.S I am 18, but age here says 51, I don’t know why.