Albert Richardson came up with the butter churn. Originally in. 1891 who wanted to make butter had to do so by hand in a bowl. Yet, when Albert Richardsonâs invention was a device that consisted. of a large wooden cylinder container with a plunger-like handle which. moved up and down. Doing this, the movement caused oily parts of. cream or milk to become separated from the watery parts. This simplified. the process of making butter.
It may take 1-2 days to recover after LASIK eye surgery. Most patients can return to work the next day after LASIK procedure.
As a general rule, we recommend that patients are at least 21 years of age for LASIK or PRK vision correction. Some patients have been treated younger than this with excellent and stable results and the minimum is probably 18. More important than age is the health of the eyes and the stability of the refraction.