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Prevalence of cataract considerably varies by age group, as well: for ages 50–59, it is 7.88%; for ages 60–69, it is 24.94%; for ages 70–79, it is 51.74%; in people over 80 years old, it is 78.43%. The overall cataract-surgery coverage rate was 9.19%. The prevalence of cataract and cataract surgical coverage also significantly varies by ...
Cataract surgery is the removal of the natural lens of the eye that has developed a cataract, an opaque or cloudy area. [3] Over time, metabolic changes of the crystalline lens fibres lead to the development of a cataract, causing impairment or loss of vision.
Posterior capsular opacification, also known as after-cataract, is a condition in which months or years after successful cataract surgery, vision deteriorates or problems with glare and light scattering recur, usually due to thickening of the back or posterior capsule surrounding the implanted lens, so-called 'posterior lens capsule opacification'.
A 2009 study showed that the prevalence of cataract blindness in people 50 years and older ranged from 0.5% in Buenos Aires, to 2.3% in parts of Guatemala. Poor vision due to cataracts ranged from 0.9% in Buenos Aires, to 10.7% in parts of Peru. Cataract-surgical coverage ranged from good in parts of Brazil to poor in Paraguay, Peru, and ...
A minority of patients may regain low or moderate visual acuity, but over 70% are left clinically blind with worse than 20/400 vision. [4] A Nigerian study showed other complications include secondary glaucoma, hyphaema, and optic atrophy. [5] Couching does not compare favourably to modern cataract surgery.
Patricia Era Bath (November 4, 1942 – May 30, 2019) was an American ophthalmologist and humanitarian. She became the first female member of the Jules Stein Eye Institute, the first woman to lead a post-graduate training program in ophthalmology, and the first woman elected to the honorary staff of the UCLA Medical Center.
2-year functional survival (visual acuity better than 1.30 logMAR or 20/400 Snellen): 63% for OOKP and 49% for OKP; 10-year functional survival (visual acuity better than 1.30 logMAR or 20/400 Snellen): 38% for OOKP and 17% for OKP [6] Another long-term study of 181 patients puts the chances of retaining an intact OOKP after 18 years at 85%. [7]
Complications after cataract surgery are relatively uncommon. Posterior vitreous detachment (PVD) may occur but does not directly threaten vision. [23] Some people develop a posterior capsular opacification (PCO), also called an after-cataract. This may compromise visual acuity, and can usually be safely and painlessly corrected using a laser.
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