Cataracts are arguably the most common form of ophthalmic disease. The age of onset varies and can occur from newborns to the elderly. The most common symptom is a loss of vision, but the manifestation varies, such as blurred vision and decreased visual acuity.
There are several types of cataracts, including congenital cataract, traumatic cataract, senile cataract, and metabolic cataract. Depending on the cause of cataract, the symptoms may vary slightly. Congenital cataracts occur in infants and young children. Because they are too young to tell about their vision, the main symptom they show is that they are not sensitive to chasing after light. The loss of vision in traumatic cataracts is very rapid, some within a few hours. In addition to vision loss, traumatic cataracts also have other trauma-induced eye symptoms; if they are accompanied by lens dislocation, double vision can occur. Cataracts can also have different symptoms depending on the location of the lens clouding. If the clouding occurs in the middle part of the lens, that is, nuclear cataract, myopia may occur.
In summary, the main symptom of cataract is blurred vision, and the symptoms may vary depending on the type of cataract and its cause.