As a medication, lysine is used probably most commonly in the treatment of herpes simplex labialis, better known simply as herpes or cold sores. It works best as a preventative option, although it can reduce how long an outbreak lasts.
Anisocoria is a condition in which the two pupils of the eye are different sizes; in other words one pupil is larger than the other. In some cases, the abnormal pupil may be the one that is smaller and in other cases the abnormal pupil may be the one that is larger.
Pupil dilation and constriction can determine the valence of surprise from the action to the reaction of the individual. Positive valence to surprise is shown through a dilation or expansion of the pupil, where as negative valence in surprise is associated with pupil constriction.