A cataract clouds the eye’s natural lens behind the iris and pupil. For people over 40, cataracts become the most common cause of vision loss and blindness. Cataracts come in various types including:
• Subcapsular: This type of cataract appears at the back of the lens, occurring at a greater rate in people with diabetes, high farsightedness, retinitis pigmentosa, and those taking high doses of steroid medication.
• Nuclear: A symptom often associated with aging, the nuclear cataract forms in the central zone or nucleus of the eye’s lens.
• Cortical: Occurring in the lens cortex, a cortical cataract refers to the white, wedge-like opacities that begin in the periphery of the lens and work their way to the centre.
• Corneal Ulcer: A corneal ulcer is an erosion or open sore in the outer layer of the cornea, often caused by infection related to bacteria, viruses, fungi or a parasite. Other causes include severe dry eyes, scratches on the eye’s surface and inflammatory disorders.