Senile cataract: This type of cataract appears around the age of 65 or after. It is the most frequent type of cataract; approximately 50% of those older than 60 years of age experience a certain amount of clouding of the crystalline lens. Senile cataract is due to the aging of the cells of the crystalline lens; over time it become increasingly more difficult to change shape in order to make the necessary accommodation. The development of senile cataract is sometimes very rapidly aggravated, although it tends to be slow in the majority of cases. It also tends to occur in both eyes. The only solution for correcting senile cataract is surgery; a more effective treatment does not exist.
Congenital cataract: This type of cataract is rare and the causes are not well known. Patients who suffer from congenital cataract are young people and infants. The cataracts are generally present from the time of birth and cause poor vision. The assessment of this disorder in infants depends on the criteria of the observer and the behavior of the child.
Traumatic cataract: This type of cataract results from accidents. There are two different types of traumatic cataract: 1) contusive cataract and; 2) cataract involving capsular injury. The patient generally suffers a gradual clouding of vision and in rare cases, it may be regressive.
Secondary cataract: This type of cataract is caused by diabetes mellitus, an abnormal thyroid, excessive exposure to UV- and X-rays, the ingestion of certain types of medication (corticosteroids), etc. The diabetic cataract rarely appears in the young diabetic population, but in adults, the diabetes can cause an acceleration of age-related cataract.