An ophthalmic illumination system can include an optical fiber configured to transmit a light beam output by a light source and focused by a condenser. The optical fiber can include proximal, distal, and central portions. The proximal portion can be configured to receive the light beam focused by the condenser. The distal portion can be configured to emit the light beam to illuminate a surgical field. The central portion can extend between the proximal and distal portions. A core diameter of the proximal portion can be larger than core diameters of the central and distal portions. An ophthalmic illumination method can include focusing, using a condenser, a light beam emitted by a light source onto a proximal portion of an optical fiber. The method can also include transmitting, using the optical fiber, the light beam to a surgical field.眼科照明系統可以包括光纖，該光纖被配置成傳輸由光源輸出且由聚光器聚焦的光束。該光纖可以包括近端部、遠端部、和中心部。該近端部可以被配置成接收由該聚光器聚焦的光束。該遠端部可以被配置成發射該光束以照亮手術野。該中心部可以在該近端部與該遠端部之間延伸。該近端部的芯直徑可以大於該中心部和該遠端部的芯直徑。眼科照明方法可以包括使用聚光器將由光源發射的光束聚焦到光纖的近端部上。該方法還可以包括使用該光纖將該光束傳輸到手術野。
