Figure 5
From: Eye orbit effects on eyeball resonant frequencies and acoustic tonometer measurements
Wave propagation and modeling. (a) One wave in skull (considering the red arrow, for example) propagates into the tissues and then into the eyeball. It is reflected, refracted, and scattered many times and is transformed into many waves. All these waves are trapped by the bone boundaries, but not the corneal boundary. (b) The waves emitted from the cornea are trapped again by the dish boundary, but not by the central hole of the dish. The waves were reflected several times and then propagated into the empty chamber. (c) Two photos of the dish. A small hole is connected to the empty chamber. (d) The simplified mass-spring-damper model. The equivalent springs, the equivalent dampers, and the equivalent masses describe the eyeball embedded in the skull and the intraocular pressure is modeled by adjusting the corneal spring constant.
