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. 2002 Sep 1;543(Pt 2):633–642. doi: 10.1113/jphysiol.2002.021527

Figure 5. Modulation transfer functions.

Figure 5

Modulation transfer function of normal human (▪, continuous line), keratoconic human corneas (▵, dashed line) and bovine corneal stromas, equilibrated at 154 mm NaCl, with individual hydration close to 3.2 (▪, ▴, •, dotted line). Bovine corneal stromas equilibrated at 10 mm NaCl had contrast sensitivity below the estimated threshold shown as a continuous bold line. Data on keratoconic corneas were kindly supplied by T. M. Mubard & S. A. Hodson (personal communication) and shown here for a comparison. cpd, cycles per degree.