Why is xalatan (latanoprost) (anti-glaucoma drug) advised to be used in the evening?

Convenience: This useful anti glaucoma drop is commonly presicribed for use at bedtime just for convenience and remembrance with a bottle at the bedside or next to the toothbrush. It could be taken at some other time on a regular basis. Some note that the internal eye pressure is highest in the wee hours of the morning so bedtime use gets a little extra effect at that time.