In a discussion of this subject it is appropriate to say that a cataract is designated as senile if the patient has reached the fiftieth year of age; uncomplicated, when not associated with any special disease; and immature, when the opacity does not extend throughout the entire lens substance.
While this designation is in accord with the generally accepted teaching of to-day, technically we probably are not warranted in associating cataract with senility in the sense that the opacity of the lens occurring after middle life is a symptom of senility; or in designating a cataract as uncomplicated simply because we fail to detect the co-existence of any other intraocular pathologic condition.
Numerous observers have asserted that there are good grounds for considering eyes in which cataract develops as otherwise diseased. Thus Becker1 states that, strictly speaking, there is no such thing as a primary cataract, the expression "primary"
BULSON AE. THE EXTRACTION OF UNCOMPLICATED IMMATURE SENILE CATARACT. JAMA. 1905;XLV(13):905–915. doi:10.1001/jama.1905.52510130025001g
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