Types of Cataracts in the Eye
Learn about the types of cataracts in the eye and common symptoms like blurred vision and light sensitivity. Discover how cataracts affect vision...
**Dr. Mahmoud Hassan**
**VITREO-RETINAL and Cataract (المياه البيضاء) Surgery Consultant**
FRCS Glasgow · FICO · MRCS Edinburgh
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When the eye's lens loses its transparency and flexibility, vision is severely affected. The condition that impairs the transparency of the eye's lens is known as a cataract. Cataracts are one of the most common eye diseases, impacting a person's ability to see and leading to many other bothersome symptoms. However, many people believe that cataracts are a single type and affect patients in only one way, but in reality, there are many types of cataracts in the eye.
Therefore, in this article, we will discuss the different types of cataracts, what are the symptoms of cataracts in the eye? We will provide a quick overview of how cataracts affect the eye, and we will distinguish between cataracts and glaucoma (الجلوكوما / المياه الزرقاء) in the eye, with the help of one of the specialized ophthalmologists in cataract surgery in Egypt, Dr. Mahmoud Hassaan - Retinal and Vitreous (الجسم الزجاجي) Surgeon at Al-Mashreq Eye Center, Cataract and Refractive (تصحيح الإبصار) Surgery Specialist, Fellow of the International Council of Ophthalmology (طب وجراحة العيون), and Member of the Royal College of Surgeons of England. So, follow us through to the end of this article.
Types of Cataracts in the Eye
When researching types of cataracts in the eye, we will find that cataracts have many types and classifications. Besides age-related cataracts, other types include:
Pediatric Cataracts
Cataracts can affect children and infants. Some children may be born with cataracts, known as congenital cataracts. Other children may develop cataracts after birth due to eye injury or other health problems. It is crucial to treat pediatric cataracts early because they can lead to a condition known as lazy eye (amblyopia) in children.
Traumatic Cataracts
Direct eye injuries can lead to cataracts. However, treating this type of cataract can be somewhat complex because other structures and tissues surrounding the lens may also require treatment.
Secondary Cataracts
This type is not a true cataract but rather hazy spots that appear on the lens capsule or on the membrane covering an artificial intraocular lens (العدسة داخل العين). This type may be referred to as posterior capsular opacification (PCO). PCO is a common complication of cataract surgery and can form due to the proliferation of some body cells on the surface of the posterior capsule. However, it is easily treated by cleaning the lens or opening the eye capsule in an outpatient clinic.
Don't let cataracts hinder your vision! Learn about their types and how to treat them now.
Types of Cataracts in the Eye Based on Their Location
To continue our discussion about other types of cataracts, let's first understand the structure of the eye's lens, which will then allow us to comprehend other cataract types. Looking at the eye's lens, we will find that it consists of several parts:
- The lens nucleus, located in the center of the lens.
- The cortex, which surrounds the lens nucleus.
- The lens capsule, a membrane that surrounds the cortex but is not an actual component of the lens itself. It acts like skin, covering and protecting the eye's lens.
After understanding the parts of the eye's lens, let's return to the discussion of cataract types. We will find several types that can be classified according to where the cataract begins. These types include:
- Nuclear Cataracts: This type of cataract originates in the lens nucleus or in the center. It causes the center to change color to brown or yellow and can rapidly increase a patient's near-sightedness.
- Cortical Cataracts: This type affects the cortex surrounding the lens nucleus.
- Posterior Subcapsular Cataracts: This type affects the posterior area of the lens. This type develops and progresses faster than the previous two types and may arise from long-term use of certain medications.
What are the Symptoms of Cataracts in the Eye?
After learning about the different and diverse types of cataracts, let's discuss how cataracts affect the patient and what symptoms appear as a result of various types of cataracts. In general, cataracts lead to many symptoms in the patient, which include:
- Blurry vision.
- Difficulty seeing at night.
- Faded color perception.
- Increased sensitivity to light.
- Seeing halos around lights.
- Double vision in the affected eye.
- Constant need to change eyeglass prescriptions.
Before moving on to the section on the difference between cataracts and glaucoma, let's clarify that all these symptoms appear in the patient because cataracts affect the light passing through the lens in two ways. First, they scatter the light passing through the lens, leading to blurred vision and haziness. Second, cataracts prevent some light rays from passing through the lens, resulting in an inability to form a clear and sharp image of what a person is looking at.
The Difference Between Cataracts and Glaucoma in the Eye
Some people believe that there is no difference between cataracts and glaucoma in the eye and that they are the same thing. However, in reality, the two conditions are entirely different. Therefore, let's clarify the difference between cataracts and glaucoma in the following paragraphs.
Let's start first with glaucoma (Glaucoma), which is elevated eye pressure that eventually leads to damage to the optic nerve. The optic nerve is responsible for transmitting signals from the retina (الشبكية) to the brain to form a clear image and allow a person to understand what they are seeing. This nerve is often damaged when eye pressure is high.
As the optic nerve begins to deteriorate, the patient experiences less sensitive spots in their field of vision. Elevated eye pressure occurs due to the accumulation of eye fluid called aqueous humor in the eye and the inability to drain this fluid. Glaucoma (pathological high eye pressure) leads to many symptoms such as headaches, vision problems, and many other symptoms, but the symptoms vary depending on the type of glaucoma. Often, it starts without symptoms until irreversible damage occurs.
Therefore, regular follow-ups are always necessary, especially if a family member has this disease, due to the genetic factor. Also for those with high myopia or those taking medications containing cortisone, whether pills, inhalers, or eye drops.
Cataracts, on the other hand, are an opacification of the eye's lens, leading to cloudy spots in the lens, whether in the nucleus, cortex, or posterior capsule. This prevents light rays from passing through and affects the patient's ability to see. It also leads to many bothersome symptoms that affect the patient's quality of life.
Based on all the above, the difference between cataracts and glaucoma in the eye is very significant. However, the only similarity between them may be that they both affect the quality of vision and lead to many annoying problems, but they differ in terms of causes and treatment methods. Glaucoma is more dangerous as its effect on vision cannot be reversed.
Signs of Cataract Surgery Failure
Signs indicate that the surgery was unsuccessful. Knowing these signs is important for early medical intervention and correcting any problems that may arise. Here are some signs that may indicate problems after cataract surgery:
- Worsening Vision: If the patient notices that their vision is getting worse instead of improving after surgery, this could be an indicator of a problem. Persistent blurred vision or haziness that does not improve over time can be evidence of surgical failure.
- Persistent Pain and Discomfort: Some pain and discomfort are normal immediately after surgery, but if the pain continues for several days or is severe, it may be a sign of infection or other complications.
- Eye Redness or Swelling: Excessive eye redness and swelling after surgery may indicate inflammation or infection.
- Increased Eye Sensitivity to Light: While light sensitivity may be common immediately after surgery, its prolonged persistence may indicate underlying problems.
- Seeing Halos Around Lights: If the patient sees halos around light sources or experiences blurred night vision and this does not improve over time, it may mean that the artificial lens was not implanted correctly or there are other problems.
- Vision Loss: Any loss of vision after surgery is a serious sign and requires immediate medical attention.
If any of these symptoms appear after cataract surgery, it is important to contact a doctor immediately for evaluation and to determine appropriate treatment steps. In some cases, additional surgery may be necessary to correct any problems that arise.
Ultimately, there are many types of cataracts in the eye, but what is more important than knowing the types of cataracts is consulting the best specialized ophthalmologists to receive the best medical service and choose the latest and best treatment methods for cataracts.
You can contact Dr. Mahmoud Hassaan's clinic - Retinal and Vitreous Surgeon at Al-Mashreq Eye Center, Cataract and Refractive Surgery Specialist, Fellow of the International Council of Ophthalmology, and Member of the Royal College of Surgeons of England - to learn all the details about cataracts.
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**Why Retinal Examination Matters Before Cataract Surgery**
A thorough retinal examination is essential prior to cataract surgery to detect any underlying retinal conditions that could affect surgical outcomes and post-operative vision clarity. Learn more about our [Vitreous Removal and Retinal Detachment (انفصال الشبكية) Repair](/en/services/vitrectomy (استئصال الجسم الزجاجي)-retinal-detachment) service.
💡 **Some cataract surgery complications can involve the retina** — Learn more about our [Vitreous Removal & Retinal Detachment Repair](/en/services/vitrectomy-retinal-detachment) service for prevention and early treatment.
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**📌 Important Medical Note by Dr. Mahmoud Hassan:**
Before any cataract surgery, a thorough retinal examination is essential to detect early any conditions that could affect surgical outcomes and post-operative vision clarity. For more on diagnosis and treatment of retinal conditions, see our [Vitreous Removal & Retinal Detachment Repair](/en/services/vitrectomy-retinal-detachment) service.
Frequently Asked Questions
What are the types of cataracts?
The types of cataracts in the eye include: age-related cataracts, congenital cataracts, and cataracts caused by injury or other diseases such as diabetes and lens inflammation, among other types.
When should cataract surgery be performed?
Surgery should be performed when cataracts severely affect vision to the extent that the patient may experience functional blindness.
What do cataracts look like in the eye?
Cataracts appear as cloudy or hazy spots in the eye's lens resulting from the breakdown and accumulation of proteins and fibers in the lens, preventing light from passing through.
كم تكلفة عملية المياه البيضاء (الكتاراكت)؟
تتراوح تكلفة عملية المياه البيضاء مع زراعة عدسة أحادية البؤرة (Monofocal IOL) بين 20,000 و 35,000 جنيه مصري للعين الواحدة، وتختلف التكلفة حسب نوع العدسة المختارة وحالة المريض ودرجة تقدم المياه البيضاء. للحصول على تقييم دقيق وعرض سعر مخصص، يمكنك التواصل عبر واتساب لحجز موعد استشارة.