Hi HudaD,
to GameBoomers.
Lots of members have had trouble with this.
The best method I found was to let the machine swing and watch closely for the highest point at which the eyeball swings out, and to remember that spot. Then, to set the machine off again and immediately place the cursor at that spot to click/grab the eyeball up. It's all about speed and timing.
If you still have problems let us know.