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Black Cataracts Symptoms, Causes & Treatment Options

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    What is Black Cataracts?

     

    A black cataract is a very advanced form of cataract. In a normal cataract, the lens of the eye slowly becomes cloudy or white. But in black cataract, the lens turns dark brown or almost black. Doctors also call it “mature” or “hypermature” cataract in many cases.

    The lens inside our eye is normally clear. It helps light pass through and focus on the retina. When it becomes thick, hard, and dark, light cannot pass properly. That is when vision becomes very poor.

    One common type of black cataract is nuclear black cataract, where the central part (nucleus) of the lens becomes extremely dense and dark over time. This usually happens in long-standing age-related cataract.

    In simple terms, a white cataract appears milky or opaque, while a black cataract is much denser and darker, usually seen in long-standing, untreated cases.

    Causes of  Black Cataracts?

    The most common cause is ageing. As people reach their 50s or 60s, the lens slowly starts to lose clarity. If treatment is not taken in time, it can become dense and dark.

    Other common black cataract causes include:

    • Long-standing untreated cataract
    • Diabetes
    • Eye injury
    • Long-term use of steroid medicines
    • Excess exposure to sunlight
    • Poor access to medical care

    People with uncontrolled diabetes are at higher risk. High blood sugar affects the lens and speeds up cataract formation.

    How is Black Cataracts Diagnosed?

    The doctor checks vision using a standard eye chart. After that, eye drops are put to dilate the pupil.

    Using a slit lamp machine, the doctor examines the lens. In black cataract, the lens looks dense and dark. Sometimes, it becomes very hard.

    Eye pressure is also checked because advanced cataracts can sometimes increase pressure inside the eye. In very dense cataracts, ultrasound of the eye may be done to check the retina since it cannot be seen clearly.

    How to Prevent Black Cataracts?

     

    • Its progression can be slowed:

      • Regular eye check-up after 40 years
      • Control blood sugar if diabetic
      • Wear sunglasses in strong sunlight
      • Avoid smoking
      • Eat a proportional diet with green vegetables and fruits

    Conclusion

    A black cataract is an advanced stage of cataract where the eye lens becomes dark and very dense. It usually develops over many years if a regular cataract is ignored. Vision can be reduced severely, but the good news is that surgery is highly effective.

    With timely treatment, most patients regain good vision. In India, awareness and regular eye check-ups are very important, especially for elderly people and those with diabetes.

    Frequently Asked Questions:

     About  Black Cataracts

    Early symptoms are similar to those of a common cataract. Blurred vision, glare in sunlight, difficulty seeing at night, and frequent changes in glasses numbers are early signs.

    They usually develop after 60 years. However, people with diabetes or previous eye injury may develop it earlier.

    Surgery is the only effective treatment for black cataract in India. Removing the cloudy lens and replacing it with an artificial lens gives good results in most cases.

    Surgery is advised when vision becomes poor and daily work, such as reading, walking, or driving, becomes difficult. In advanced cases, surgery should not be delayed.

    Most patients recover within 2 to 4 weeks. 

    The choice depends on the patient’s needs, budget, and the doctor’s advice.

    Age-related cataract cannot be fully prevented.

    Yes, poor blood sugar control speeds up cataract formation.