Types of Cataracts by LocationCataracts are classified by doctors according to the location of the opacity, or clouding, of the lens.
- Nuclear Sclerotic Cataract: A nuclear sclerotic cataract is
Types of Cataracts by LocationCataracts are classified by doctors according to the location of the opacity, or clouding, of the lens.
- Nuclear Sclerotic Cataract: A nuclear sclerotic cataract is the most common type of age-related cataract. This type of cataract causes a gradual yellow cloudiness and hardening of the central part of the lens called the nucleus. Changes in vision are usually gradual. In some cases, patients may see an actual improvement in near vision before their vision deteriorates to a significant degree. Referred as "second sight," this stage is usually only temporary.
- Cortical Cataract: A cortical cataract generally appears as a cloudy opacity in the part of the lens called the cortex. The cortex consists of the peripheral, or outer part, of the lens. These cataracts often resemble wheel spokes that point inward toward the center of the lens. Light tends to scatter when it hits the spoke-like opacities.
- Posterior Subcapsular Cataract: Often referred to as a PSC, a posterior subcapsular cataract is an opacity that develops on the back surface of the lens, directly underneath the lens caspsular bag that houses the lens. This type of cataract causes light sensitivity, blurred near vision, and glare and halos around lights. They are more common in diabetic patients and patients who have taken steriods for extended periods of time.
Types of Cataracts by OriginEye doctors also classify cataracts according to their origin.
- Age-related Cataract: Most cataracts develop as we age. Although signs can be seen as early as your 40s to 50s, cataracts usually do not become significant until the late 60s or 70s.
- Secondary Cataracts: Cataracts can sometimes develop after undergoing eye surgery, such as surgery for glaucoma or retinal surgery. Patients with diabetes sometimes develop cataracts earlier than normal. Also, patients who are taking steroids for an extended period of time may develop cataracts.
- Traumatic Cataract: Cataracts sometimes result from direct injury or trauma to the eye. Cataracts may develop immediately or years after an event