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Leber's congenital amaurosis (LCA) is a collection of inherited, degenerative eye disorders that can reduce the strength of visual clarity or sharpness in infants and can cause childhood blindness. [14] [15] These eye disorders are mostly autosomal recessive diseases, and diagnoses of LCA are linked to multiple gene variants, including the ...
Visual impairment. 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]
The symptoms and signs associated with convergence insufficiency are related to prolonged, visually demanding, near-centered tasks. They may include, but are not limited to, diplopia (double vision), asthenopia (eye strain), transient blurred vision, difficulty sustaining near-visual function, abnormal fatigue, headache, and abnormal postural adaptation, among others.
Cortical blindness-Cortical blindness is the total or partial loss of vision in a normal-appearing eye caused by damage to the brain's occipital cortex. [7] Retrobulbar neuritis- Retrobulbar neuritis cause of visual loss with normal fundus but there will be relative afferent pupillary defect (RAPD) and abnormal visually evoked responses. [8]
Childhood blindness is an important contribution to the national prevalence of the disability of blindness. [ 3] Blindness in children can be defined as a visual acuity of <3/60 in the eye with better vision of a child under 16 years of age. [ 4] This generally means that the child cannot see an object 10 feet (about 3 meters) away, that ...
Leber congenital amaurosis. Leber congenital amaurosis ( LCA) is a rare inherited eye disease that appears at birth or in the first few months of life. [ 2] It affects about 1 in 40,000 newborns. [ 1] LCA was first described by Theodor Leber in the 19th century. [ 3][ 4] It should not be confused with Leber's hereditary optic neuropathy, which ...
Diagram showing changes in the eye with myopia: Specialty: Ophthalmology, optometry: Symptoms: Distant objects appear blurry, close objects appear normal, headaches, eye strain [1] Complications: Retinal detachment, cataracts, glaucoma [2] Causes: Combination of genetic and environmental factors [2] Risk factors
1 in 100,000. Blue cone monochromacy ( BCM) is an inherited eye disease that causes severe color blindness, poor visual acuity, nystagmus, hemeralopia, and photophobia due to the absence of functional red (L) and green (M) cone photoreceptor cells in the retina. BCM is a recessive X-linked disease and almost exclusively affects XY karyotypes.