Author: Federico Graue Wiechers, MD

Purpose: To show vascular findings using a Swept-Source OCT Angiography (SS-OCTA) instrument in non-proliferative and proliferative MacTel type 2.

Methods: Twenty-eight eyes of 14 patients were examined in the MacTel 2 group and twenty-two eyes of 11 patients in the control group. All patients underwent a complete ophthalmic examination along with fundus photography, SS-OCTA and SS-OCT, FAF and FFA. All eyes were classified using a SS-OCTA grading system based on the location and extension of the vascular abnormalities in five stages (Stage 0-4). Additionally, a description of the findings in multimodal imaging was performed.

Results: Using SS-OCTA, 17 eyes (60.8%) were classified as non-proliferative (Stage 0-3) and 11 eyes (39.2%) as proliferative (Stage 4). Vascular abnormalities were mainly seen in the deep capillary plexus starting in the juxtafoveal temporal region with progression affecting in a diffuse way, a vascular network in outer retina and the presence of blood flow connecting the intraretinal neovascular complex with the choroidal vasculature was observed.

Conclusion: Swept-Source OCT Angiography is a helpful tool to obtain detailed information of vascular abnormalities as well as detecting the presence of neovascular complexes in MacTel type 2.