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 is the opening in the central part of iris which is responsible for controlling light entering into eyes. So pupil dilates when the light is dim while it shrinks if the light is strong and bright. So in a dim environment, dilated pupils are very common and normal that you don't have to worry about it.