Participants who received either lampalizumab or sham comparator every 4 weeks in one of the parent studies and completed the Week 96 visit will receive open-label lampalizumab as 10 milligrams (mg) via ITV injection, administered every 4 weeks.

Participants who received either lampalizumab or sham comparator every 6 weeks in one of the parent studies and completed the Week 96 visit will receive open-label lampalizumab as 10 mg via ITV injection, administered every 6 weeks.

Lampalizumab 10 mg will be administered every 4 or 6 weeks according to the frequency given during participation in the parent study.

An AE was defined as any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether considered related to the medicinal product, any new disease or exacerbation of an existing disease, recurrence of an intermittent medical condition, or any deterioration in a laboratory value or other clinical test. Ocular AEs are the events which are localized in the ocular region.

An AE was defined as any unfavorable and unintended sign, symptom, or disease temporally associated with the use of a medicinal product, whether considered related to the medicinal product, any new disease or exacerbation of an existing disease, recurrence of an intermittent medical condition, or any deterioration in a laboratory value or other clinical test.

The immunogenicity analysis included participants with at least one predose and one postdose anti-lampalizumab antibodies assessment. Predose was defined as prior to the first dose in the extension study for the prior sham participants, and prior to the first dose in the parent study for the prior lampalizumab participants.