Fig. 1

Detailed steps of preparing the custom made needle to perform suprachoroidal triamcinolone acetonide injection. a The first step was to measure the entire length of a 30-gauge needle which can penetrate to the eye using the caliper. b, c The second step was to prepare a plastic sleeve obtained from a branula with the length of 900–1000 μm lower than the needle length, and then autoclaved them. d, e The plastic sleeves were put on the head of the needle in a way that allowed only 900–1000 μm of the needle to expose and penetrate the eye in order to perform suprachoroidal injection