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The word glaucoma comes from the Ancient Greek word γλαυκός (glaukós), meaning 'gleaming, blue-green, gray'. There are different types of glaucoma, but the most common are called open-angle glaucoma and closed-angle glaucoma. [7] Inside the eye, a liquid called aqueous humor helps to maintain shape and provides nutrients.
In people with glaucoma, the size of their visual span is limited due to the loss of peripheral vision, and the number of words they can see is also less. When measuring a smaller visual span in the central 10° in the visual field, people with glaucoma on average identified 2.3 less words at one glance than people with healthy eye conditions ...
Specialty. Ophthalmology. A scotoma is an area of partial alteration in the field of vision consisting of a partially diminished or entirely degenerated visual acuity that is surrounded by a field of normal – or relatively well-preserved – vision. Every normal mammalian eye has a scotoma in its field of vision, usually termed its blind spot.
940 million / 13% (2015) [ 5 ] 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 ]
Far-sightedness primarily affects young children, with rates of 8% at 6 years old and 1% at 15 years old. [9] It then becomes more common again after the age of 40, known as presbyopia, affecting about half of people. [4] The best treatment option to correct hypermetropia due to aphakia is IOL implantation. [2]
They were able to restore vision in blind mice by treating their severed optic nerves with a variety of chemicals that coaxed the at-rest nervous system into action.
Normal tension glaucoma. Normal tension glaucoma (NTG) is an eye disease, a neuropathy of the optic nerve, that shows all the characteristics of primary open angle glaucoma except one: the elevated intraocular pressure (IOP) - the classic hallmark of glaucoma - is missing. Normal tension glaucoma is in many cases closely associated with general ...
When refractive errors in children are not treated, the child may be at risk of developing ambylopia, where vision may remain permanently blurry. [32] Because young children typically do not complain of blurry vision, the American Academy of Pediatrics recommends that children have yearly vision screening starting at three years old so that unknown refractive errors or other ophthalmic ...
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