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Fig. 1. Lens shapes and cold-cataract cooling experiment on the lenses of three
species (Bos taurus, Myripristis jacobus and Dissostichus
mawsoni) from three different physiological temperatures (37°C,
25°C and –2°C, respectively). (a–d) Schematics of the
shapes (a,c) and a picture (b,d) of a D. mawsoni (a,b) and B.
taurus (c,d) lens. (e,f) Cold-cataract experiment results showing lenses
from the cow, B. taurus. (e) A fresh lens at room temperature
(25°C); (f) a bovine lens that had been packed in ice for approximately
1.5 h, from which it was removed and allowed to warm. This image was taken
during the warming process after the cortex had rapidly clarified and the
nucleus was still opaque, showing the cold-cataract (arrow). (g–i) The
eye lens from the tropical marine blackbar soldierfish M. jacobus
held at (g) 15°C for 6 h; (h) 0°C for 6 h; (i) 0°C for 48 h,
showing a definite inner nuclear region that is more opaque that the cortex
region (arrow). (j–k) Images of the Antarctic toothfish D.
mawsoni eye lens. (j) Endogenous clear –2°C lens contrasted to
a lens held at –12°C for 6 h (k). The still clear toothfish lens
after 48 h at –12°C (l) has a thin sheen of opacity. It is important
to note that the opacity is restricted to the surface and not to the inner
portions of the lens, as in the cow (f) and the soldierfish (i). Scale bars,
1.2 cm (e), 0.4 cm (g), 1.0 cm (j).
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