LAUSR

tightened and the lens thinner. In contrast to the lens in children, the lens in adults slightly and continuously thickens with older age until an age of 55 years, after which lens thickness slightly decreases, if the association is adjusted for male gender, higher body stature, higher body mass index, thicker central cornea, shallower anterior chamber depth and hyperopic refractive error (Jonas et al. 2012). Interestingly, lens thickness was not related to the amount of time spent outdoors or indoors. It is in contrast to axial length which, as shown in numerous studies, increases with a higher ratio of time spent indoors to outdoors (He et al. 2015). It fits with the notion that the process of emmetropization and myopization is associated mainly with changes posterior to the ora serrata and equator (Heine 1899). The data may be helpful to elucidate the process of emmetropization and myopization and may be taken into account in surgeries with intraocular lenses or implantable contact lenses. References