Cataracts Glossary of Terms

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

Aging: The process of becoming older, a process that is genetically determined and environ...

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Ambulatory: Able to walk about, not bedridden or immobile.

Anatomy: The study of human or animal form, by observation or examination of the living be...

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Anesthesia: Loss of feeling or awareness, as when an anesthetic is administered before sur...

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Anesthesiologist: A physician or, less often, a dentist who is specialized in the practice...

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Anterior: The front, as opposed to the posterior. The anterior surface of the heart is tow...

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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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Brain: The portion of the central nervous system that is located within the skull. It func...

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Capsule: Capsule has many meanings in medicine including the following:

  1. In medici...

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Cataract: A clouding or loss of transparency of the lens in the eye as a result of tissu...

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Cataract surgery: Removal of the clouded (cataractous) lens in its entirety via surgery an...

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Congenital: A condition that is present at birth, whether or not it is inherited.

Contrast: Short for "contrast media." Contrast media are X-ray dyes used to provide contra...

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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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Cortex: The outer layer of any organ.

Cortical: Having to do with the cortex, the outer layer of an organ.

Diabetes: Usually refers to diabetes mellitus or, less often, to diabetes insipidus. Diabe...

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Dilation: The process of enlargement, stretching, or expansion. The word "dilatation" mean...

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Enzyme: Proteins that speeds up the rate of a chemical reaction in a living organism. An e...

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Essential: In medicine, of unknown cause, as in essential hypertension (high blood pressur...

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Eye chart test: This test measures how well you see at various distances. The eye chart i...

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Focal: Pertaining to a focus which in medicine may refer to:
1. The point at ...

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Glaucoma: A common eye condition in which the fluid pressure inside the eye rises to a lev...

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Herbal: 1. An adjective, referring to herbs, as in an herbal tea.
2. A...

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Implant: 1. To embed; to set in firmly. In embryology, the fertilized egg implants ...

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Implantation: The act of setting in firmly.

Incision: A cut through skin or other tissue performed by a health care professional.

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

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Inflammation: A localized reaction that produces redness, warmth, swelling, and pain as a ...

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Intervention: The act of intervening, interfering or interceding with the intent of modify...

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Intraocular: In the eye. For example, intraocular pressure is the pressure within the eye....

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Intraocular lens: An artificial lens made of plastic, silicone, acrylic or other material ...

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Iris: The circular, colored curtain of the eye. The opening of the iris forms the pupil. T...

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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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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.

Medical history: 1. In clinical medicine, the patient's past and present which may ...

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Microscope: An optical instrument that augments the power of the eye to see small objects....

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Multifocal: Having to do with two or more foci or arising from two or more places. For exa...

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

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Operating room: A facility that is equipped for performing surgery. Abbreviated OR.

Ophthalmologist: A physician who practices ophthalmology.

Ophthalmology: The art and science of eye ?medicine.

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Outpatient: A patient who is not hospitalized, but instead comes to a physician?s office, ...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Peripheral: Situated away from the center, as opposed to centrally located.

Peripheral vision: Side vision. The ability to see objects and movement outside of the di...

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Phacoemulsification: A type of cataract surgery in which the lens with the cataract is bro...

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Posterior: The back or behind, as opposed to the anterior.

Preoperative: Before surgery. As opposed to postoperative, after surgery.

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

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Probe: 1: In surgery, a probe is a slender flexible rod with a blunt end used to explore, ...

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Protein: One of the three nutrients used as energy sources (calories) by the body. Protein...

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Proteins: Large molecules composed of one or more chains of amino acids in a specific orde...

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Pupil: The opening of the iris. The pupil may appear to open (dilate) and close (constrict...

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Radiation: 1. Rays of energy. Gamma rays and X-rays are two of the types of energy ...

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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 cr...

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Retinal: Pertaining to the retina, the extraordinary layer of neurons (nerve cells) that ...

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Retinal detachment: A separation of the retina from its connection at the back of the eye....

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Sensation: In medicine and physiology, sensation refers to the registration of an incoming...

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Sensitivity: 1. In psychology, the quality of being sensitive. As, for example, sen...

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Sleep: The body's rest cycle.

Statins: A class of drugs that lower cholesterol.

Surgeon: A physician who treats disease, injury, or deformity via operative or manual meth...

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

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Tonometry: A standard eye test that is done to determine the fluid pressure inside the eye...

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Topical: Pertaining to a particular surface area. For example, a topical agent is applied ...

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Trauma: A physical or emotional injury.

Ultrasound: High-frequency sound waves. Ultra-sound waves can be bounced off tissues by us...

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UV radiation: Ultraviolet radiation. Invisible rays that are part of the energy that comes...

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Visual acuity: The clarity or clearness of vision, a measure of how well a person sees.

Visual acuity test: This test measures how well you see at various distances. It is the f...

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Vital: Necessary to maintain life. For example, breathing is a vital function.

Vitamins: The word "vitamin" was coined in 1911 by the Warsaw-born biochemist Casimir Funk...

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