Page 41 - Computational Retinal Image Analysis
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2 Optics of the eye 31
objects such as drusen, since they are effectively back illuminated [32]. A notable
quid pro quo for the enhanced contrast of confocal imaging is the reduced image in-
tensity, but some optimization is possible by employing a hybrid between direct and
indirect detection as shown in Fig. 7 for a two-wavelength SLO image [30]. For both
FIG. 7
(A) and (B) Images acquired with (upper) direct mode and (lower) multimode. Right images are
a closed-up of the rectangle. Illumination wavelength is 532 nm in (A) and 633 nm in (B) [30].
