Given the information you know regarding monozygotic twins originating from the same zygote, if one monozygotic twin is nearsighted, the other twin:

If one monozygotic twin is nearsighted, the other twin has a very high chance of being nearsighted.

Explanation:

Two offspring produced by the same pregnancy is known as Twins. Twins can be either Monozygotic twins or Dizygotic twins.

Monozygotic twins means identical twins. Monozygotic twins develop from one zygote. Each twin is developed from a separate egg and each egg is fertilized by their own sperm cell.

Monozygotic twins look alike and almost have same sex unless there has been a mutation during development.

If one monozygotic twin is nearsighted, the other twin has a very high chance of being nearsighted.