误差的一个来源是折射，即光束通过不同温度和压力的空气层时发生的弯曲现象。
One source of error is refraction, the bending of light beams as they pass through air layers of different temperature and pressure.
压力引起视网膜内的微血管扭结弯曲，如图中的一个箭头所示，图中的其它箭头所指为视网膜静脉内的“凹陷”，称作动静脉局部缩窄病症。
The pressure causes tiny blood vessels in the retina to kink and twist, which is pointed out by one arrow. The other arrow points to "dents" in retinal veins, a condition known as A-V nicking.
通过测量由内部压力而造成的眼球弯曲度变化，Sensimed公司的Triggerfish镜片能够制造一个更加精确的剖面。
By measuring the changes in the curvature of the eye caused by a build-up of internal pressure, Sensimed's Triggerfish lens can build up a much more accurate profile.
应用推荐