Astigmatism Glossary of Terms

The following are health and medical definitions of terms that appear in the Astigmatism article.

Astigmatism: A common form of visual impairment in which part of an image is blurred due t...

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Blurred vision: Lack of sharpness of vision with, as a result, the inability to see fine d...

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Cornea: The clear front window of the eye, which transmits and focuses light into the eye....

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Corneal: Pertaining to the cornea, the clear front window of the eye that transmits and fo...

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Corneal topography: Also known as videokeratography or corneal mapping, corneal topography...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Family practice: The medical specialty which provides continuing and comprehensive health ...

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Farsightedness: An error of refraction in the human eye that causes light rays to focus be...

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Fatigue: A condition characterized by a lessened capacity for work and reduced efficiency ...

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Horizontal: In anatomy, a plane passing through the standing body. A person lying on a bed...

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Hyperopia: Farsightedness; the ability to see distant objects more clearly than close obj...

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Incidence: The frequency with which something, such as a disease or trait, appears in a pa...

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Infection: The invasion and multiplication of microorganisms such as bacteria, viruses, an...

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Injury: Harm or hurt. To harm, hurt, or wound. The word injure may be in physical or emot...

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Keratoconus: A cone-shaped cornea, with the apex of the cone being forward. Keratoconus ca...

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Laser: A powerful beam of light that is used in some types of surgery to cut or destroy ti...

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Laser surgery: A type of surgery that uses the cutting power of a laser beam to make blood...

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LASIK: Abbreviation standing for laser-assisted in situ k/...

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Lens: The transparent structure inside the eye that focuses light rays onto the retina.

Myopia: Nearsightedness, the ability to see close objects more clearly than distant objec...

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Nearsightedness: The ability to see near objects more clearly than distant objects. Also ...

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Ocular: Having to do with the eye.

Onset: In medicine, the first appearance of the signs or symptoms of an illness as, for ex...

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Ophthalmologist: A physician who practices ophthalmology.

Ophthalmology: The art and science of eye ?medicine.

Presbyopia: The loss of the eye's ability to change focus to see near objects. The reason...

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Prescription: A physician's order for the preparation and administration of a drug or dev...

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Prognosis: The forecast of the probable outcome or course of a disease; the patient's chan...

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Refraction: In opthalmology, the bending of light that takes place within the human eye. R...

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Retina: The retina is the nerve layer that lines the back of the eye, senses light, and c...

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Strabismus: A condition in which the visual axes of the eyes are not parallel and the eyes...

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Surgery: The branch of medicine that employs operations in the treatment of disease or inj...

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Trauma: A physical or emotional injury.

Vertical: In anatomy, upright. As opposed to horizontal.

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