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Cataracts cause 51% of all cases of blindnessand 33% of visual impairmentworldwide. [3][9] Cataracts are most commonly due to agingbut may also occur due to traumaor radiation exposure, be present from birth, or occur following eye surgery for other problems. [1][4]Risk factors include diabetes, longstanding use of corticosteroidmedication ...
Cataract surgery is the most common application of lens removal surgery, and is usually associated with lens replacement. It is used to remove the natural lens of the eye when it has developed a cataract, a cloudy area in the lens that causes visual impairment. [ 4][ 10] Cataracts usually develop slowly and can affect one or both eyes. [ 4]
The word "cataract" comes from the Greek word καταρρέω ("to flow down"), although the original Greek term was the plural-only Κατάδουποι. However, contrary to this, none of the Nile's six primary cataracts could be accurately described as waterfalls, and given a broader definition, this is the same with many of the minor ...
Cataracts cause the lens of the eye to become cloudy over time, but if they are left untreated, they can lead to complete blindness. While cataracts are unable to spread from one eye to another ...
Treatment options depend on the severity of the condition. For children under the age of two years old whose vision is affected by the cataracts in both eyes, surgical options include intraocular lens implantation or a lensectomy. [2] Congenital cataracts are considered to be a significant cause of childhood blindness.
Phacoemulsification is a cataract surgery method in which the internal lens of the eye which has developed a cataract is emulsified with the tip of an ultrasonic handpiece and aspirated from the eye. Aspirated fluids are replaced with irrigation of balanced salt solution to maintain the volume of the anterior chamber during the procedure.
Cataract surgery was first mentioned in the Babylonian code of Hammurabi 1750 BCE. [12] The earliest known depiction of cataract surgery is on a statue from the Fifth Dynasty of Egypt (2467–2457 BCE ). [12] According to Francisco J Ascaso et al, a "relief painting from tomb number TT 217 in a worker settlement in Deir el-Medina " shows "the ...
Posterior capsular rupture, a tear in the posterior capsule of the natural lens, is the most-common complication during cataract surgery. [8] Posterior capsule rupture can cause lens fragments to be retained, corneal oedema, and cystoid macular oedema; it is also associated with increased risk of endophthalmitis and retinal detachment.
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