The first patient has been enrolled in a phase 2 open-label multicenter study to evaluate intravitreal THR-317, an anti-PIGF antibody, for the treatment of macular telangiectasia type 1, according to a press release from Oxurion. The study will enroll 10 patients with macular edema caused by macular telangiectasia type 1 (MacTel 1), a rare disease that affects the macula and can lead to vision loss. There is no current effective treatment for MacTel 1.