The Ong Eye Speculum for glaucoma surgery has a larger inferior blade which pushes on the inferior conjunctival fornix to turn the eye down and this exposes the superior sclera. It is a unique and original design, which turns the eye down without the need of a superior corneal traction suture.

See video: http://www.vimeopro.com/user16902123/asian-journal-of-ophthalmology/video/61258394