Although some meditation may include the process of focusing on a single point it is an easy fallacy to fall into because that is only one type of meditation called concentrative meditation. other forms of meditation such as mindfulness mediation aim to observe everything that is around them. As such i have removed the confusing section and replaced. Also noticed that both uworld and kaplan mention that it causes increase in alpha waves so also included that in extra section.

Uworld:
Meditation is a practice whereby individuals regulate their awareness and attention with the goal of achieving mental clarity and emotional calmness. Although meditation techniques vary, they can include focusing on one's own breathing or other present-moment stimuli (eg, the sound of rain), or mentally repeating a mantra (a short saying or thought). Neuroimaging studies have shown that meditation not only results in relaxation but also produces an altered state of consciousness, demonstrated by an increase in alpha brain waves

Kaplan:
Meditation usually involves quieting of the mind for some purpose, whether spiritual, religious, or related to stress reduction. In the secular Western tradition, meditation is often used for counseling and psychotherapy because it produces a sense of relaxation and relief from anxiety and worrying. To that end, meditation causes physiological changes such as decreased heart rate and blood pressure. On EEG, meditation resembles Stage 1 sleep with theta and slow alpha waves.