Igwe OCT (Optical coherence tomography) bụ nyocha onyonyo na-adịghị emerụ ahụ yana bara uru n'ịchọpụta ọtụtụ nsogbu anya. OCT na-eji ebili mmiri ọkụ were foto retina gị.Ya na OCT , onye na-ahụ maka anya gị nwere ike ịlele ọkwa nke retina nke ọ bụla.