Cortical Cataract Symptoms, Causes & Treatment Options
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What is Cortical Cataract?
Cortical cataract is a kind of cataract that impacts the outer layer of the natural lens of the eye, known as the cortex. The lens is normally clear and helps focus light on the retina. When a cataract develops, the lens becomes cloudy.
In cortical cataract, white or greyish wedge-shaped opacities start forming from the outer edge of the lens and slowly move towards the centre. As they progress, vision gradually gets affected.
There are two types of Cortical Cataract:
- Posterior Cortical Cataract: The clouding develops in the back portion of the cortical layer. This type of Cortical Cataract may cause increased glare and difficulty in bright light.
- Anterior Cortical Cataract, where the opacity forms in the front portion of the cortex. This type of Cortical Cataract often leads to mild visual disturbance in the early stages.
Causes of Cortical Cataract
Many factors can lead to cortical cataract:
- Ageing:
As we grow older, the lens proteins and water balance change. This causes senile cortical cataract.
- Diabetes:
High blood sugar levels increase the risk. Patients with uncontrolled diabetes often develop cataracts earlier.
- Excessive sunlight exposure:
Long-term exposure to ultraviolet (UV) rays without eye protection can increase risk.
- Steroid use:
Long-term use of steroid tablets, inhalers, or eye drops may contribute.
- Eye injury:
Previous trauma to the eye can lead to cataract formation.
- Genetic factors:
Sometimes there is a family history of early cataract.
Symptoms
Treatments
Symptoms
Symptoms of Cortical Cataract
In the early stage of cortical cataract, many people may not notice much change. As the cataract grows, symptoms become clearer.
Common symptoms include:
- Glare from headlights or sunlight
- Difficulty driving at night
- Blurred vision
- Seeing halos around lights
- Frequent change in spectacle number
- Double vision in one eye
Treatments
Treatment Options for Cortical Cataract
In the early stages of cortical cataract, stronger glasses or anti-glare lenses may help for some time. But glasses cannot remove cataracts.
The only permanent treatment is cortical cataract surgery. The cloudy lens is removed and replaced with an artificial intraocular lens.
The most commonly performed method is phacoemulsification. In this procedure, a small incision is made, and the cataract is broken using ultrasound and removed. A foldable lens is inserted. In advanced cases, other surgical techniques may be used.
How is Cortical Cataract Diagnosed?
Diagnosis is simple and painless. An eye specialist will do:
- Vision testing
- Slit-lamp examination to see the lens clearly
- Dilated eye examination to check the retina
In most cases, no special scans are required. However, before surgery, measurements are taken to calculate the strength of the intraocular lens (IOL) that will be implanted.
How to Prevent Cortical Cataract?
Cataracts cannot always be prevented, especially age-related ones. But risk can be reduced by:
- Wearing sunglasses that block UV rays
- Controlling blood sugar in diabetic patients
- Avoiding smoking
- Eating a balanced diet with green vegetables and fruits
- Regular eye check-ups
Conclusion
Cortical cataract is a common age-related eye condition. It usually develops slowly but can affect daily life if not treated. The good part is that cortical cataract treatment has very good outcomes when done at the right time. If you or your family member notices vision problems, do not ignore them.
Frequently Asked Questions:
About Cortical Cataract
What are the early symptoms of Cortical Cataract?
Early symptoms include glare from lights, mild blurring of vision and difficulty seeing clearly at night.
At what age does Cortical Cataract usually develop?
It is most commonly seen after 50 years of age.
What is the best treatment for Cortical Cataract?
Surgery is the only effective treatment.
When is surgery required for Cortical Cataract?
Surgery is advised when vision starts affecting daily activities like reading, driving or watching television.
How long is the recovery after surgery for Cortical Cataract?
Most patients recover functional vision within a few days. Complete healing may take 3–4 weeks.
What type of lens is best for Cortical Cataract?
The choice of lens depends on the patient’s eye condition and budget.
Can Cortical Cataract be prevented?
It cannot be fully prevented. But controlling diabetes, protecting eyes from sunlight, and regular check-ups can reduce risk.
Does diabetes increase the risk of Cortical Cataract?
Yes. High blood sugar can lead to earlier and faster cataract formation.
