Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
These are great! My wife's eyesight is not good and is different in each eye, but we can share these binoculars and never have to readjust or focus! Everything is crystal clear no matter where you look. It's amazing how they work.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive