Sentence examples for can't see from inspiring English sources

"can't see" is both correct and usable in written English.
It is a grammatically correct contraction of "cannot see." You can use it in written English to express the inability to see something or to understand something. Example: I can't see the numbers on the board from the back of the classroom. In this sentence, "can't see" is used to convey the physical inability to see the numbers on the board. Another example: I can't see how this plan will work. In this sentence, "can't see" is used to express the inability to understand how the plan will be successful.