Three of them are doing just fine. However, one of them has a problem as evidenced by the leaves which look as if someone has held a candle too close to the edges of each leaf and they have become brown and crispy - covering almost half of the leaf, but starting with the outside edge (away from the stem).
Again infants and children normally drool during sleep, but some adults too drool during sleep. Moreover, drooling in case of adult is not always normal. Drooling can be quite common in adult while sleeping. But when awake, drooling in adult can not only be embarrassing but very uncomfortable leading to social and mental burden. The reasons for an adult to drool during sleep can be due to an open mouth, abnormal structure of the mouth like enlarged tonsils, large tongue or overcrowded teeth.
What causes someone to sleep with their eyes open? Quick Answer. According to the Vision Center of Excellence, sleeping with one's eyes open, or nocturnal lagophthalmos, can be caused by a number of factors, including a cone-shaped cornea and prior eye injuries. Neurological conditions, such as Bell's palsy, and eye protrusion, such as that caused by Grave's disease, also cause nocturnal lagophthalmos. The use of alcohol or sedatives prior to sleep increases the risk of nocturnal lagophthalmos.