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At some point—usually as you enter middle age—most people develop this eye condition, which is a clouding of the eye’s lens that can get progressively worse and impair your vision. According ...
Cyanopsia is most commonly reported in older adults after cataract surgery, where symptoms typically subside within a few days to weeks as the eyes adapt to the synthetic lens. In younger adults, cyanopsia is often caused by medications like sildenafil, with symptoms disappearing once the drug's effects wear off.
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'.
This made visual rehabilitation after cataract surgery a more efficient, effective, and comfortable process. [107] Intracapsular cryoextraction was the favoured form of cataract extraction from the late 1960s to the early 1980s using a liquid-nitrogen-cooled probe tip to freeze the encapsulated lens to the probe.
Visual or vision impairment (VI or VIP) is the partial or total inability of visual perception.In the absence of treatment such as corrective eyewear, assistive devices, and medical treatment, visual impairment may cause the individual difficulties with normal daily tasks, including reading and walking. [6]
Myopia can be induced with minus spherical lenses, [57] and overminus in prescription lenses can induce myopia progression. [ 58 ] [ 59 ] Overminus during refraction can be avoided through various techniques and tests, such as fogging, plus to blur, and the duochrome test .
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 ...
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.
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