Read e-book online Handbook of Optical Systems, Volume 4: Survey of Optical PDF

Optics

By Herbert Gross (ed.)

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1 Introduction A large number of theoretical eye models can be found in the literature. Nearly all models have two versions of the data for the relaxed and the accommodated eye, respectively. All the models try to describe the paraxial data of the eye by the corresponding radii, distances and refractive indices. The complex shell structure of the 25 26 36 Human Eye relative part in % male female 12 8 4 IPD [mm] 0 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 Statistical distribution of the interpupillary distance over a large number of people for males and females.

As can also be seen in the figure, the ability of the eye to adapt decreases with increasing age. There are two special cases of eye adaptation defects, which are also indicated in figure 36-22 [36-9]. If the rod pigment cannot be produced, the person suffers from night blindness during conditions of low radiance. If, on the other hand, vision is achieved only with rods and not the cones, monochromatic vision occurs. The adaptation of the eye to increasing radiance takes place very quickly. In general, the adaptation effect is dominated by the rods and therefore is performed in the peripheral regions and not in the fovea.

5 Dazzling If the radiance of the scene is too great for retinal detection, the eye is dazzled. There are three different kinds of dazzling [36-11]: 1. 2. 3. Absolute dazzling, the radiance is too large and cannot be reduced sufficiently by adaptation. Relative dazzling, there are large radiance differences inside the field of view. The hot spots in the object structure produce dazzling. Adaptation dazzling, the reaction to adapt the eye is too slow and the temporal change in the radiance is too fast.

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