10/06/2026
Ever notice that the world doesn’t look quite as sharp, bright, or colorful as it used to?
It’s easy to blame a dirty pair of glasses or poor lighting, but a gradual change in your sight could be due to a cataract. A cataract is a slow, progressive clouding of the eye’s natural lens. Think of it like a clean window slowly gathering frost—eventually, it changes how light enters the eye, making everything look a bit blurry, faded, or dim.
While many people associate cataracts strictly with aging, the truth is that the lens of the eye is highly sensitive, and various factors can cause or accelerate this clouding. Here is a complete breakdown of why cataracts develop:
1. The Natural Aging Process (Age-Related Cataracts)
This is the most frequent cause. Inside our eyes, the lens is mostly made of water and proteins. As we age (typically starting around age 40), these proteins begin to naturally break down and clump together. Over time, these clumps grow larger, creating a cloudy mist over the lens that interferes with light entering the eye.
2. Hereditary Factors (Genetics)
Your family history plays a significant role in your eye health. If your parents, grandparents, or siblings developed cataracts—especially at an earlier age—you may be genetically predisposed to experiencing them too. Genetic factors can influence both the structure of your lens proteins and how quickly they begin to break down.
3. Medical Conditions (Diabetes)
Individuals with diabetes are at a significantly higher risk of developing cataracts, often much earlier in life. High blood sugar levels cause excess glucose to build up in the eye's lens. This gets converted into a substance called sorbitol, which alters the lens structure and causes it to swell and cloud over rapidly.
4. Prolonged UV Exposure (Sun Damage)
Just like the sun can damage your skin, ultraviolet (UV) radiation can harm your eyes. Chronic, unprotected exposure to sunlight generates oxidative stress in the lens. This chemical stress damages the lens proteins and speeds up the clouding process, which is why wearing UV-protected sunglasses is recommended.
5. Eye Injuries or Trauma (Traumatic Cataracts)
A physical injury to the eye—such as a blunt blow, a puncture, a chemical burn, or even an electrical shock—can disrupt the delicate fibers of the lens. A cataract can form immediately after the injury, or in some cases, it can develop quietly many years down the road.
6. Long-Term Medication Use (Steroids)
Using certain medications over a long period can trigger cataract formation. The most common culprits are corticosteroids (like prednisone), whether they are taken as oral tablets, inhaled for asthma, or used as prescription eye drops.
7. Lifestyle Factors (Smoking and Alcohol)
Smoking introduces harmful toxins into the body and increases the production of free radicals, which damage the cellular structure of the eye's lens. Heavy alcohol consumption has also been closely linked to a higher risk of developing cataracts early.
8. Congenital Factors (Born with Cataracts)
Though rare, some babies are born with cataracts or develop them during childhood. This is usually due to inherited metabolic disorders, genetic predispositions, or an infection (such as rubella) that the mother experienced during pregnancy.
💡 The Good News: While cataracts are a normal part of life for many, they are highly treatable. Modern cataract surgery is a safe, routine, and highly effective outpatient procedure that can restore your clear vision and get you back to enjoying the things you love.
If you or a loved one are experiencing blurry vision, faded colors, frequent changes in your eyeglass prescription, or difficulty driving at night, it might be time for a comprehensive eye exam. Contact your nearest ophthalmologist and let’s take care of your vision together!
FRANCES MARIE ROA LINGAD, MD, DPBO, FPAO Ophthalmologist | External Diseases and Cornea Specialist
Mae Renelyn Arabejo Mae Renelyn Malquisto Arabejo Secc FL Cth EyeClinic CTH Eye Clinic Divine Word Hospital - St. Paul's Hospital Eastern Visayas Medical Center Christ the Healer Hospital Department of Ophthalmology - Eastern Visayas Medical Center Eye Clinic at Christ the Healer Hospital - Sogod Leyte
