Text-book of ophthalmology . s, oris sclerosed. There are many individual differences in this regard, so thatpersons of the same age have lenticular nuclei of different size. The size ofthe nucleus is of practical importance in the operation for cataract. 1 Synonyms: Zonula Zinnii, ligamentum suspensorium lentis. 521 522 TEXT-BOOK OF OPHTHALMOLOGY The sclerosed portion of the lens is hard and rigid, incapable of chang-ing its shape. Hence, the further advanced the sclerosis of the lens is, theless able is the latter to make that alternating change in its shape whichis requisite for the act of
Text-book of ophthalmology . s, oris sclerosed. There are many individual differences in this regard, so thatpersons of the same age have lenticular nuclei of different size. The size ofthe nucleus is of practical importance in the operation for cataract. 1 Synonyms: Zonula Zinnii, ligamentum suspensorium lentis. 521 522 TEXT-BOOK OF OPHTHALMOLOGY The sclerosed portion of the lens is hard and rigid, incapable of chang-ing its shape. Hence, the further advanced the sclerosis of the lens is, theless able is the latter to make that alternating change in its shape whichis requisite for the act of accommodation. For this reason the accommoda-tive power diminishes with advancing age (presbyopia; see § 762). The nucleus reflects more light than the non-sclerosed part of the , the pupil in elderly people, whose lens has a large nucleus, is nolonger of such a pure black as in youth. It gives a gray or grayish-greenreflex (the senile reflex), which by the inexperienced is easily confoundedwith beginning cataract.
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