Fig. 2
From: Additive effects of narrowband light and optical defocus on chick eye growth and refraction
A representative ultrasound trace obtained by A-scan ultrasonography. The upper panel shows the captured ultrasound trace. The bottom panel shows the expanded trace of the back of eyes (highlighted by a horizontal blue bar in the upper panel) to illustrate the selected peaks corresponding to the interfaces: vitreal-retinal (VR) interface, peak in front of retina; retinal-choroidal (RCh) interface, peak in front of choroid; choroidal–scleral (ChS) interface, peak at inner sclera; and the back of sclera (S), peak at outer sclera