Mild visual side effects are not unusual but remit promptly. Image Credit: Image Point Fr / Īs a consequence of light therapy, patients can complain of irritability, headaches, eye strain, sleep disturbances, and insomnia. Even though this type of treatment is generally very safe, negative effects may occur. Light therapy can be defined as exposure to daylight or specific wavelengths of light for a prescribed amount of time in order to treat seasonal affective disorder, acne, and a myriad of other conditions.
