What Are the 3 Types of Cataracts? | Causes, Symptoms & Diagnosis
What Are the 3 Types of Cataracts?
Cataracts are a common eye condition in which the natural lenses of the eye start to become cloudy, gradually leading to blurry or impaired vision. This can happen in different ways for different people. As we go along, we’ll take a closer look at how cataracts can develop in 3 different types, each with its causes, symptoms, and how they typically progress.
1. Nuclear Cataract
A Nuclear Cataract develops in the central area of the eye lens and is the common type associated with aging. Adults over the age of 50 are most commonly affected. It’s a slow-growing condition and often takes years to get prominently noticed. As it develops, the lens may gradually harden and turn yellow or brown, leading to blurry distance vision and faded color perception. As the cataract progresses, it may cause temporary improvement in near vision (known as “second sight”), but this improvement is temporary and typically followed by further deterioration.
Symptoms of Nuclear Cataract:
- Blurred distance vision
- Yellowing or browning of vision
- Fading of colors
- Difficulty seeing in low light
2. Cortical Cataract
A cortical cataract begins in the outer layer (cortex) of the lens and gradually extends inward toward the center. It is commonly seen in adults aged 40 to 60 and marked by white streaks or wedge-shaped lines that look like spokes on a wheel, starting from the edge of the lens and moving toward the center. These irregularities scatter light entering the eye, often causing glare, halos, and difficulty with night vision, making activities like driving in the dark challenging.
Symptoms of Cortical Cataract:
- Glare and light sensitivity
- Halos around lights (especially at night)
- Blurred or hazy vision
- Poor night vision
3. Posterior Subcapsular Cataract
A posterior subcapsular cataract develops at the back of the lens, just beneath the lens capsule, right in the path of light entering the eye. It tends to grow faster than other types of cataracts and is more commonly seen in younger individuals with diabetes or those who use steroid medications long-term. This type often affects near vision first and can significantly interfere with everyday activities like reading, using a phone, or working on screens.
Symptoms of Posterior Subcapsular Cataract:
- Difficulty reading or seeing in bright light
- Light sensitivity
- Halos or glare from lights
- Vision is worse in bright environments
| Cataract Type | Key Symptoms | Typical Age Group |
|---|---|---|
| Nuclear | Blurry distance vision, yellow or faded colors, frequent prescription changes, needing brighter light to read, and double vision | 50+ |
| Corticalr | Glare and halos around lights, difficulty seeing at night, cloudy or filmy vision, double vision | 40–60 |
| Posterior Subcapsular | Light sensitivity, glare, halos, difficulty reading, fast-onset blurry vision, trouble seeing in bright light or sunlight | Under 60 |
| General (All types) | Cloudy/blurry/foggy vision, dull color perception, light sensitivity, glare or halos, poor night vision, worsened nearsightedness, double vision | Varies |
How to Identify Which Type of Cataract You Have?
Getting a detailed eye exam from an optometrist or ophthalmologist is the best way to find out what type of cataract you may have and start the right treatment. They can assess your vision and examine your eyes thoroughly to understand the type and severity of the cataract. Based on this, they’ll recommend the most suitable cataract treatment to help restore your vision.
Sign up for a free cataract screening with the best cataract surgeons of Gurgaon now!
Can You Have More Than One Type?
Yes, it’s common for someone to have more than one type of cataract at the same time because cloudy spots can appear in different parts of the lens. Mixed cataracts are prevalent in older adults, as the lens undergoes multiple age-related changes over time. When multiple types are present, each may progress at a different rate and affect vision in unique ways.
For example, someone might experience both blurred distance vision from a nuclear cataract and glare or halos at night due to a cortical or subcapsular cataract. This combination can make vision problems more complex and symptoms more pronounced.
In such cases, treatment may require a more personalized approach, especially if the cataracts differ in severity or impact on daily activities.
Risk Factors and Causes
While aging is the most common cause, other health conditions and lifestyle choices may also contribute:
- Aging: The most frequent cause of cataracts. As you grow older, the proteins in the lens begin to break down and clump together, leading to clouding.
- Diabetes: People with diabetes are more prone to cataracts, especially posterior subcapsular types, due to changes in blood sugar levels that affect the lens.
- Eye Trauma: Injuries to the eye, even from years earlier, can damage the lens and trigger cataract formation.
- Steroid Use: Long-term use of oral or eye drops can lead to the early development of cataracts.
- UV Exposure: Exposure to sunlight without eye protection can contribute to lens changes, increasing the risk of cataracts.
Understanding these risk factors can help you take preventive measures, such as wearing UV-protective sunglasses, managing blood sugar levels, and scheduling regular eye check-ups.
Diagnosis and What Happens Next?
Comprehensive eye exams are essential for detecting not only cataracts but also other potential eye issues that may impact your vision. Regular eye check-ups are important with age, even if you haven’t noticed major changes in your sight.
What to Expect During a Test?
During your visit, the doctor will ask about your vision changes, lifestyle impact, and medical history. A series of tests will follow to assess the presence and severity of cataracts, such as:
- Slit Lamp Exam: This allows the doctor to examine the structures at the front of your eye under high magnification.
- Visual Acuity Test: Measures how you can see letters or symbols from a distance, similar to a standard eye chart.
- Retinal Exam (often with pupil dilation): Helps inspect the back of the eye for any additional issues.
This helps to know whether the cataract is the main reason for vision problems or if other eye conditions are also involved.
Monitoring Mild Cataracts vs. Planning Surgery
If your cataract is mild and not yet interfering with your daily life, your doctor may recommend these non-surgical strategies that can help manage symptoms in the early stages:
- Regular eye check-ups to monitor progression
- Updating your glasses prescription
- Using brighter lighting for reading or tasks
- Wearing anti-glare sunglasses
Looking for cataract treatment? We have the team of Best Cataract Surgeons in Gurgaon who bring together experience of tens of thousands of cataract surgeries.
Surgery may be considered when:
- Your vision significantly affects reading, driving, or daily activities
- Glasses or lighting adjustments no longer improve vision
- The cataract continues to worsen over time
Cataract treatment is generally safe and highly effective, but the decision is based on how much your vision is impacted.
FAQ's
Can children have cataracts?
Yes, children can be born with cataracts or develop them due to genetic conditions, infections, or trauma. Early detection and treatment are important to prevent long-term vision problems or developmental delays.
Can lifestyle changes prevent progression?
While lifestyle changes can’t stop cataracts entirely, wearing UV-protective sunglasses, quitting smoking, managing diabetes, and eating antioxidant-rich foods may slow their progression and help maintain overall eye health.
When does a cataract need treatment?
A cataract needs treatment when it significantly affects your vision and daily activities, such as reading or driving. Surgery is recommended only when symptoms can no longer be managed with glasses or lighting changes.
What is the most serious type of cataract?
The most serious type of cataract is the mature or hyper-mature cataract, which can lead to severe vision loss and complications like glaucoma. Posterior subcapsular cataracts are also serious due to rapid progression.
What is the biggest cause of cataracts?
The biggest cause of cataracts is aging. As you get older, the proteins in your eye’s lens start to break down and clump together, making the lens cloudy and affecting your vision.