Reply: We thank Mackool for his comments about our report of a new capsule stabilization device for supporting a lens with weak zonular support.1 The device was made in 2002, and since 2003, it has been used in approximately 100 eyes. The purpose of the capsule stabilization device is to stabilize the capsule safely. We know of some phacoemulsification techniques for cases of zonular weakness.2–6 The flexible iris retractor is a conventional instrument designed to hook the edge of the iris. The retractor is useful for standard surgery in eyes with a small pupil, but not for supporting the lens capsule. Since 1997, several reports have described phacoemulsification using the retractor at the edge of the continuous curvilinear capsulorhexis.2–5 During surgery, the iris retractor sometimes detached from the lens capsule because it was too short to obtain capsule stability. Our device has a T-shaped end that passes around the anterior capsule flap to fit the curvature of the equator and minimize stress on the capsule equator. The T-shaped end suspends and protects the capsule at a few points gently and stably. Mackool reported capsule stabilization using relatively long metallic retractors.6 However, because the metallic retractor is hard, it can damage the endothelium, corneal incision, and capsule on insertion, manipulation, or removal. In contrast, our device is flexible, 10.0 mm in length, and fashioned from 5-0 nylon. We have not experienced any technical difficulty during the course of phacoemulsification. The T-shaped end is a unique feature of the device. The capsule stabilization device aided in supporting and stabilizing the lens capsule during phacoemulsification in cases with a weak zonule. We believe it ensures a stable capsule–iris complex, reducing surgical risks. Eiichi Nishimura MD, PhD Shigeo Yaguchi MD, PhD Hitoshi Nishihara MD Masahiko Ayaki MD, PhD Tadahiko Kozawa MD, PhD