EYE PROSTHESIS Russian patent published in 2000 - IPC

FIELD: medical engineering. SUBSTANCE: device has sclera, cornea and iris produced from soda-lime glass having coefficient of thermal expansion equal to 92-107 10^-7 grade^-1 and permissible thermal expansion coefficient deviation of not greater than 10%. Sclera is produced from glass of the following composition, in % by mass: Al₂O₃ 0.7-4.5, B₂O₃ 2.0-6.6, MgO 0-1.5, ZnO 3.5-15, K₂O 2.5-12.2, Na₂O 3.5-15.5, Na₂SiF₆ 2.5-6.0, 3NaFAlF₃ 1.1-11.0, dye to 2.2706 SiO₂ making the rest. Iris is produced from glass of the following composition, in % by mass: Al₂O₃ 0.7-4.5, B₂O₃ 0-2.0, CaO 0-3.3, ZnO 3.5-15, K₂O 2.5-12.2, Na₂O 3.5-15.5, Na₂SiF₆ 2.5-6.0, 3NaFAlF₃ 1.1-11.0, dye to 60 SiSiO₂ making the rest. Cornea is produced from glass of the following composition, in % by mass: Al₂O₃ 1.0-2.8, B₂O₃ 2.0, CaO 3.0-4.5, MgO 0-3.0, ZnO 0-2.5, K₂O 6.5-10.0, Na₂O 10.5-12.7, 3NaFAlF₃ 1.0, SiO₂ making the rest. EFFECT: full-scale imitation of human eye. 1 tbl