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.
How long does the PRK procedure take? While you should plan to be with us on your procedure day for about 90 minutes, the procedure itself takes less than 15 minutes to complete. In fact, the laser will be used on each eye for less than one minute. Dry Eyes: Dry eyes following LASIK or PRK can occur and are usually a temporary side effect. 2  Following your procedure, you will be asked to us artificial tears, which will help prevent the dry-eye feeling. 3  For most patients, the dryness disappears within 3 to 6 months following treatment.