HomeMedicine & HealthDiseases & Conditions (continued)What is Cataracts?
Medicine & Health·2 min·Updated Mar 15, 2026

What is Cataracts?

Cataracts

Quick Answer

Cataracts are a condition where the lens of the eye becomes cloudy, leading to blurred vision. This can happen gradually and is often associated with aging, but can also be caused by other factors.

Overview

Cataracts occur when proteins in the lens of the eye clump together, forming a cloudy area that obstructs light. This cloudiness can make it difficult to see clearly, as it affects how light passes through the lens. Over time, cataracts can worsen, leading to significant vision loss if not treated. The condition is most commonly seen in older adults, but it can also develop due to other reasons such as diabetes, prolonged exposure to UV rays, or certain medications. For example, someone who spends a lot of time outdoors without UV protection may be at a higher risk of developing cataracts. Understanding cataracts is important because they are a leading cause of blindness worldwide, but they are also treatable through surgery. Surgery for cataracts involves removing the cloudy lens and replacing it with a clear artificial lens. This procedure is typically quick and has a high success rate, allowing many people to regain their vision. Recognizing the signs of cataracts early can make a significant difference in maintaining quality of life and independence.


Frequently Asked Questions

Common symptoms include blurry vision, difficulty seeing at night, and seeing halos around lights. People may also notice colors appearing faded or yellowed.
An eye doctor can diagnose cataracts through a comprehensive eye exam. This exam typically includes checking vision and examining the lens for cloudiness.
While cataracts cannot be completely prevented, certain measures can reduce the risk. Wearing sunglasses to protect against UV light and managing health conditions like diabetes can help.