More DetailsHelps solve the problems encountered by many eyedropper users, who involuntarily blink or sometimes just miss their eye. Just clip the Guide to the top of your eye drop bottle. Special lip pushes down on your cheek which holds your lower lid down to prevent blinking, while putting in drops. Unique pinhole directs your eyesight upward and away from the descending drops. Easy to use. You'll be delighted with this.