Characterizing the thermally induced structural changes to intact porcine eye, part 1: second harmonic generation imaging of cornea stroma.
We characterize the structural changes of porcine corneal structures from 25 to 90 degrees C using second harmonic generation (SHG) microscopy. Our results show that porcine stroma undergoes several distinct stages of structural changes between 25 and 90 degrees C. A decrease in SHG intensity from 30 to 45 degrees C and the existence of SHG intensity peaks at 53, 65, and 77 degrees C correlate to distinct structural alterations of the corneal stroma. At higher temperatures, the SHG intensity decreases and a baseline in SHG signal is reached at 90 degrees C. Our results demonstrate that SHG microscopy is a useful technique for obtaining qualitative and quantitative information of thermally treated corneal fibers without histological or labeling procedures. With additional developments, SHG imaging may be developed into an effective imaging technique for in vivo characterization of cornea structural changes.
Tan
Hsin-Yuan
HY
Chang Gung Memorial Hospital, Department of Ophthalmology, Linko 333, Taiwan.
Teng
Shu-Wen
SW
Lo
Wen
W
Lin
Wei-Chou
WC
Lin
Sung-Jan
SJ
Jee
Shiou-Hwa
SH
Dong
Chen-Yuan
CY
D000818:Animals; D003315:Cornea / Q000473:pathology* / Q000528:radiation effects*; D024022:Fibrillar Collagens / Q000648:ultrastructure*; D006358:Hot Temperature; D066298:In Vitro Techniques; D036641:Microscopy, Fluorescence, Multiphoton / Q000379:methods*; D013552:Swine
D024022:Fibrillar Collagens