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| Ablate in surgery, is to remove. Ablation zone the area of tissue that is removed during laser surgery. Accommodation the ability of the eye to change its focus from distant objects to near objects. Acuity clearness, or sharpness of vision. Astigmatism a
distortion of the image on the retina caused by irregularities in Cornea the
clear, front part of the eye. The cornea is the first part of the eye
that bends Diopter the measurement of refractive error. A negative diopter value signifies an eye with myopia and positive diopter value signifies an eye with hyperopia. Dry Eye Syndrome a common condition that occurs when the eyes do not produce enough tears to keep the eye moist and comfortable. Common symptoms of dry eye include pain, stinging, burning, scratchiness, and intermittent blurring of vision. Endothelium the inner layer of cells on the inside surface of the cornea. Epithelium the outermost layer of cells of the cornea and the eye's first defense against infection. Excimer laser an ultraviolet laser used in refractive surgery to remove corneal tissue. Farsightedness the common term for hyperopia. FDA the
abbreviation for the Food and Drug Administration. It is the United
States Flap & Zap a slang term for LASIK. Ghost Image a fainter second image of the object you are viewing. Glare scatter from bright light that decreases vision. Halos are rings around lights due to optical imperfections in or in front of the eye. Haze corneal clouding that causes the sensation of looking through smoke or fog. Hyperopia the inability to see near objects as clearly as distant objects, and the need for accommodation to see distant objects clearly. Inflammation the body's reaction to trauma, infection, or a foreign substance, often associated with pain, heat, redness, swelling, and/or loss of function. Informed Consent Form
a document disclosing the risks, benefits, and alternatives
In Situ a Latin term meaning "in place" or not removed. Iris the colored ring of tissue suspended behind the cornea and immediately in front of the lens. Keratectomy the surgical removal of corneal tissue. Keratotomy a surgical incision (cut) of the cornea. Keratitis inflammation of the cornea. Kerato prefix indicating relationship to the cornea. Keratoconus a
disorder characterized by an irregular corneal surface (cone-shaped)
Keratomileusis carving of the cornea to reshape it. Laser the
acronym for light amplification by stimulated emission of radiation.
LASIK
the acronym for laser assisted in-situ keratomileusis
which refers to creating a Lens a part of the eye that provides some focusing power. The lens is able to change shape allowing the eye to focus at different distances. Microkeratome a
surgical device that is affixed to the eye by use of a vacuum ring.
Monovision the purposeful adjustment of one eye for near vision and the other eye fordistance vision. Myopia the inability to see distant objects as clearly as near objects. Nearsightedness the common term for myopia. Ophthalmologist a medical doctor specializing in the diagnosis and medical or surgical treatment of visual disorders and eye disease. Optician an
expert in the art and science of making and fitting glasses and may
also Optometrist a
primary eye care provider who diagnoses, manages, and treats disorders
Overcorrection a complication of refractive surgery where the achieved amount of correction is more than desired. PRK the
acronym for photorefractive keratectomy which is a procedure involving
the Presbyopia the inability to maintain a clear image (focus) as objects are moved closer. Presbyopia is due to reduced elasticity of the lens with increasing age. Pupil a
hole in the center of the iris that changes size in response to changes
in lighting. Radial Keratotomy commonly referred to as RK; a surgical procedure designed to correct myopia (nearsightedness) by flattening the cornea using radial cuts. Refraction a
test to determine the refractive power of the eye; also, the bending
of light Refractive Errors hyperopia, myopia, and astigmatism. Refractive Power the ability of an object, such as the eye, to bend light as light passes through it. Retina a layer of fine sensory tissue that lines the inside wall of the eye. The retina acts like the film in a camera to capture images, transforms the images into electrical signals, and sends the signals to the brain. Sclera the
tough, white, outer layer (coat) of the eyeball that, along with the
cornea, Snellen Visual Acuity Chart one of many charts used to measure vision. Stroma the middle, thickest layer of tissue in the cornea. Undercorrection a complication of refractive surgery where the achieved amount of correction is less than desired. Visual Acuity the clearness of vision; the ability to distinguish details and shapes. Vitreous Humor the
transparent, colorless mass of gel that lies behind the lens and |
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