In eye surgery with a cornea transplant, with respect to the lens, to be able to maintain the pressure balance of aqueous humor and vitreous body. Open sky device 101, corneal transplants and, be those which can be used during corneal transplantation with surgery intraocular, Futasen portion for preventing the inner fluid leakage to the outside of the eye provided inside the eyeball from the eye 10, a plurality of support portions 12 for supporting the peripheral portion the Futasen portion 10 one end portion is attached to the Futasen portion 10 bears received the supporting portion 12 is attached to the other end portion of the supporting portion 12 in which and a foot portion 14.角膜移植を伴う眼科手術において、水晶体を挟んで、房水と硝子体の内圧バランスを維持できるようにする。 オープンスカイ器具101は、角膜移植や、眼内手術を伴う角膜移植時に使用可能なものであって、眼球の内側に設けられて眼内から眼外への内液の漏洩を防止する蓋栓部10と、蓋栓部10の周縁部に一端部が取り付けられて当該蓋栓部10を支持する複数の支持部12と、支持部12の他端部に取り付けられて当該支持部12を受け支える足部14とを備えるものである。