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.
Remember, if someone's pupils are dilated, that doesn't mean they are lying - they could just as easily have knocked down an espresso, be really excited about the topic, or even be afraid that you think they're lying when they're not. Context and other indicators are very important.