Dr. Richard Bone from the Experimental Biophysics research group and Dr. Grenville Draper from Earth Sciences received special recognition by having one of their recent publications selected for inclusion in the prestigious Virtual Journal for Biomedical Optics. The publication originally appeared in Applied Optics: Optical anisotropy of the human cornea determined with a polarizing microscope Richard A. Bone and Grenville Draper Applied Optics, Vol. 46, Issue 34, pp. 8351-8357 doi:10.1364/AO.46.008351 Abstract We have investigated the optical anisotropy of the human cornea using a polarizing microscope normally used for optical mineralogy studies. The central part of the cornea was removed from 14 eyes (seven donors). With the sample placed on the microscope stage, we consistently observed hyperbolic isogyres characteristic of a negative biaxial material. The angle between the optic axes, generally similar in both eyes, ranged from 12° to 40° (mean±SD=31°±8°). The optic axial plane always inclined downward in the nasal direction at 1°-45° below the horizontal (mean±SD=22±13°). The retardance produced by the corneas was estimated to be less than 200 nm. In conclusion, the human cornea possesses the anisotropy of a negative biaxial material. Both the angle between the optic axes and the retardance were fairly constant among the majority of samples, suggestive of uniformity in corneal structure.

 

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