National Eye Institute, National Institutes of Health

Cortical Cataract

Article
Eye & Vision
Healthy Aging
+3
Contributed byKrish Tangella MD, MBASep 21, 2023

What are the other Names for this Condition? (Also known as/Synonyms)

  • Cortical Cataract Syndrome
  • Cortical Lens Opacity

What is Cortical Cataract? (Definition/Background Information)

  • Cortical Cataract is a type of cataract that affects the outer layer of the lens in the eye, known as the cortex. This type of cataract forms as wedge-shaped opacities that gradually extend from the outer edge of the lens towards its center. It often results from changes in the water content and protein structure of the lens fibers
  • Cortical Cataracts can cause visual disturbances due to the way they scatter light as it enters the eye. The signs and symptoms include blurred or hazy vision, difficulty with contrast sensitivity, glare sensitivity, and changes in the perception of colors. The scattered light from the irregularities in the lens cortex leads to these visual symptoms
  • Diagnosing Cortical Cataracts involves a comprehensive eye examination, including visual acuity tests, pupil dilation, and a slit-lamp examination. The distinctive wedge-shaped opacities within the lens cortex can be visualized, helping to confirm the presence of this type of cataract
  • In the early stages of Cortical Cataracts, vision can often be improved with prescription eyeglasses or contact lenses. However, as it progresses and starts significantly affecting daily life and visual clarity, surgical removal becomes necessary. Cataract surgery involves removing the clouded natural lens and replacing it with an artificial intraocular lens (IOL) to restore clear vision
  • Cataract surgery for Cortical Cataracts is generally successful in restoring clear vision and improving one’s overall quality of life. The surgery is considered safe and routine, with a high success rate. Patients typically experience improved visual acuity and reduced reliance on corrective eyewear after the procedure; the outcomes are usually good

Who gets Cortical Cataract? (Age and Sex Distribution)

  • Cortical Cataracts are more commonly observed in older individuals as a result of age-related changes in the lens structure
  • Both males and females are affected
  • The condition is observed across all racial and ethnic groups worldwide

What are the Risk Factors for Cortical Cataract? (Predisposing Factors)

Advanced age is the primary risk factor for developing Cortical Cataracts. Additional risk factors include:

  • Ultraviolet (UV) light exposure
  • Smoking
  • Diabetes
  • Use of certain medications

It is important to note that having a risk factor does not mean that one will get the condition. A risk factor increases one’s chances of getting a condition compared to an individual without the risk factors. Some risk factors are more important than others.

Also, not having a risk factor does not mean that an individual will not get the condition. It is always important to discuss the effect of risk factors with your healthcare provider.

What are the Causes of Cortical Cataract? (Etiology)

Cortical Cataracts develop due to alterations in the water content and protein arrangement within the lens cortex. These changes lead to the formation of wedge-shaped opacities that disrupt the lens's transparency.

What are the Signs and Symptoms of Cortical Cataract?

The signs and symptoms of Cortical Cataracts may include:

  • Blurred or hazy vision
  • Difficulty with contrast sensitivity
  • Sensitivity to glare
  • Changes in color perception

How is Cortical Cataract Diagnosed?

The diagnosis of Cortical Cataract may involve the following tests and exams:

  • Physical examination and medical history evaluation
  • Comprehensive eye examination by an ophthalmologist
  • Visual acuity tests
  • Pupil dilation (fundus examination)
  • Slit-lamp examination to visualize the wedge-shaped opacities in the lens cortex

Many clinical conditions may have similar signs and symptoms. Your healthcare provider may perform additional tests to rule out other clinical conditions to arrive at a definitive diagnosis.

What are the possible Complications of Cortical Cataract?

Complications of Cortical Cataracts include worsening visual impairment that can impact daily activities and quality of life.

How is Cortical Cataract Treated?

The treatment options depend on the severity of the Cortical Cataract.

  • In the early stages, corrective eyeglasses or contact lenses might help improve vision
  • Surgical removal of the cataract is recommended when it significantly affects vision. During cataract surgery, the clouded natural lens is replaced with an artificial intraocular lens

How can Cortical Cataract be Prevented?

While Cortical Cataracts cannot be entirely prevented, protective measures such as wearing sunglasses with UV protection and managing underlying health conditions may reduce the risk of developing cataracts.

What is the Prognosis of Cortical Cataract? (Outcomes/Resolutions)

  • The prognosis for individuals undergoing cataract surgery for Cortical Cataracts is generally favorable
  • Cataract surgery is highly successful in restoring clear vision and enhancing quality of life

Additional and Relevant Useful Information for Cortical Cataract:

  • A cataract is defined as opacification (to become opaque) or clouding of the natural clear lens that results in visual problems, including blindness

The following resource link may help in better understanding cataracts:

https://www.dovemed.com/diseases-conditions/cataract/

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Krish Tangella MD, MBA

Pathology, Medical Editorial Board, DoveMed Team

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