My eyesightis is left eyesight is 0.7~0.9 and right eyesight is 0.4~0.5
But use the glasses is every eyesight is 1.5
Here's your corrected composition, Jimmy. Please take a look at the corrections below. Have a good night there! 
Do you know how good your eyesight is?
My eyesightis is left eyesight is 0.7~0.9 and right eyesight is 0.4~0.5
>>> My left eyesight is 0.7–0.9, and my right eyesight is 0.4–0.5.
But use the glasses is every eyesight is 1.5
>>> But with glasses, my eyesight in both eyes is 1.5.