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Astigmatism is a refractive error that causes blurred or distorted vision due to an irregular curvature of the eye. Learn about the types, causes, diagnosis, and ...
Astigmatism is a type of optical aberration where rays from different planes have different foci. Learn about the forms, causes, and corrections of astigmatism in optical systems and vision science.
Refractive error, also called ametropia, is a problem with focusing light on the retina due to the shape of the eye and/or cornea. Learn about the common types (nearsightedness, farsightedness, astigmatism, presbyopia), causes, diagnosis, and treatment options.
Learn about the optical aberrations that affect the quality of vision in the human eye, such as spherical, coma and trefoil aberrations. Find out how they are measured, corrected and influenced by factors such as age, accommodation and pupil size.
Learn about the anatomy, physiology and optics of the human eye, a sensory organ that allows vision and other functions. The eye is composed of several layers, including the cornea, iris, lens, retina and sclera, and has various muscles and nerves that control its movements and responses.
Anisometropia is a condition in which a person's eyes have substantially differing refractive power, such as one eye being nearsighted and the other farsighted. Learn about the causes, symptoms, diagnosis and treatment options, such as spectacles, contact lenses and refractive surgery.
Glaucoma is a group of eye diseases that damage the optic nerve and cause vision loss. Learn about the different types of glaucoma, their risk factors, diagnosis, and treatment options from this comprehensive Wikipedia article.
Myopia, also known as near-sightedness and short-sightedness, is an eye disease where distant objects appear blurry. Learn about the genetic and environmental factors, risk factors, diagnosis, prevention, and correction methods of myopia.
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