H25-H28: Disorders of lens

H25: Senile cataract

Senile cataract refers to a group of eye conditions that commonly affects individuals over the age of 50, although the progression and severity can vary widely between individuals. These conditions are characterized by a gradual clouding of the lens in the eye, which can ultimately lead to impaired vision or blindness if left untreated. Early symptoms usually include blurriness, difficulty seeing at night or in low light, sensitivity to glare, and seeing 'halos' around lights. In many people, the condition progresses slowly, initially affecting only a small area of the lens and then gradually spreading over time. Senile cataracts are primarily caused by aging and the natural wear and tear on the eyes. They are not contagious and cannot be transmitted between individuals. Despite their prevalence, the precise mechanism by which aging causes cataracts remains unknown. However, it's thought that lifelong exposure to UV radiation and other environmental factors may play a significant role. Our eyes and vision are key to interpreting the world around us, so senile cataracts can have a significant impact on daily life, making routine activities like reading and driving difficult.