Lucentis is a medication used to treat various eye conditions, particularly age-related macular degeneration (AMD). It contains the active ingredient ranibizumab, which works by inhibiting the growth of abnormal blood vessels in the eye that can cause vision loss. Lucentis is administered as an injection into the affected eye and is typically given on a monthly basis. Lucentis is administered through an injection directly into the eye by a healthcare professional. The frequency of injections and duration of treatment will depend on the individual's specific condition and response to the medication. As with any medication, there are potential side effects of Lucentis, including eye pain, redness, or swelling, as well as increased risk of infection or bleeding.