A common abnormality of the eye in which the incoming light is not focused clearly on the retina, causing vision to be blurry. Refractive error is categorized as myopia, which is commonly called nearsightedness; hyperopia, commonly called farsightedness; and astigmatism. Refractive error can usually be corrected with glasses, contact lenses refactive surgery, which allow the light to be sharply focused on the retina , resulting in clear vision. http://www.improveyourvision.com/eye-glossary.html
The degree to which images received by the eyes are not focused on the retina ( myopia, hyperopia, or astigmatism) measured in diopters.
Optical defect in an eye. Parallel light rays are not brought to a sharp focus precisely on the retina, producing a blurred retinal image. Can be corrected by eyeglasses (spectacles), contact lenses, or refractive surgery.
a category of vision problems that refers to a loss of visual acuity. The loss of acuity is due to improper light refraction as a result of the shape of the eye. The result is a blurred image. These types of errors are eye disorders. Vision problems or abnormalities—general term used to describe a broad range of vision related abnormalities that may include correctable conditions such as near and farsightedness, disorders, diseases, impairment, and blindness.
Optical defect of the eye that causes light rays to focus in front of the retina (nearsighted), behind the retina (farsighted), or in several different places on the retina (astigmatic), resulting in less than perfect vision. These defects can normally be corrected with eyeglasses, contact lenses or refractive eye surgery. See Free Eye Tests.
A nonpathologic deficiency in the eye's optical system.
Condition that occurs when light rays entering the eye are not bent enough or are bent too much, so that they are not brought to a sharp focus on the retina. This results in myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.
Defect in the ability of the eye to focus the image, hitting it accurately. Occurs in farsightedness and nearsightedness.
a condition of the eye in which a clear image fails to focus on the retina due to optical causes
a defect in the way light passes through
a flaw in the shape of the cornea that causes images to be improperly focused on the retina
a problem in which the eye fails to focus light
a problem with the focusing power of the eye
when the eye does not provide the correct amount of focusing power for the axial length. When the eye provides too much power the person is nearsighted or myopic. When the eye does not provide enough power then the person is farsighted or hyperopic.
When the eye fails to focus light correctly and needs a lens (for example spectacles or contact lens) to correct it.
The measure of the error of focus of an eye compared to an assumed normal point of zero. The error is measured in dioptres which is the reciprocal of the focal length in centimeters. The refractive error will include measurements for myopia (short sight), hyerpmetropia (long sight) astigmatism and presbyopia (the loss of focusing power due to age for near work).
This is what happens when there is a problem with the shape of the cornea or the lens. The abnormal refraction or bending of the light beams as they pass through these two transparent parts of the eye, results in an inability to focus the image precisely onto the retina. LASIK is designed to correct specific refractive errors.
When the eye is not correctly shaped to be able to filter light beams correctly. Images will appear blurry and some sort of correction is necessary. Patients may be nearsighted, farsightedness or suffer from astigmatism.
Any condition in which light entering the eye is not focused precisely on the retina
A defect in the ability to focus light rays precisely on the retina. Common refractive errors are myopia, hyperopia and astigmatism, affecting approximately half the world's population.
condition where parallel light entering the eye is not clearly focused on the retina, resulting in blurred vision.
the degree to which light reaches the back of the eye - myopia, hyperopia, astigmatism.
Imperfect refractive powers of the eyes as in astigmatism, myopia, or hyperopia.
Nearsightedness (myopia), farsightedness ( hyperopia), and astigmatism. Click HERE for more info.
Distance focusing difficulties in an otherwise healthy eye, such as nearsightedness (myopia), farsightedness (hyperopia) and slanted or distorted vision (astigmatism). For more information: Go to the Eye and Vision Care health topic, where you can: Read articles on this topic Browse the previously asked questions Ask your own question.
The degree to which the eye's natural focus deviates from properly bringing distant images to focus on the retina. Refractive errors include: myopia (nearsightedness), hyperopia (farsightedness) and astigmatism. Presbyopia is not considered a refractive error. Go to Top
When light rays don't properly refract from the cornea to the retina, it is a refractive error. This can take the form of myopia (nearsightedness), hyperopia (farsightedness) or astigmatism.
abnormal shape of the cornea that results in decreased vision. This type of problem can usually be corrected with glasses or contacts.
In human vision, a defect in the ability of the eye to focus an image accurately. Common errors are astigmatism, hyperopia and myopia; half the world's population requires some kind of vision correction.
imperfections in the focusing power of the eye, so that light rays are not brought into sharp focus on the retina, causing blurred vision that can usually be corrected with glasses or contact lenses. Nearsightedness (myopia), farsightedness (hyperopia), and astigmatism are refractive errors.
This term encompasses myopia, hyperopia, astigmatism, and presbyopia; the four main types of eye disorders
The inability of the eye to focus images properly on the retina, including myopia (nearsightedness), hyperopia (farsightedness) and astigmatism. Go to Top | Close Window
A condition in which light bends incorrectly, causing an image to be out of focus. The most common refractive errors are astigmatism, farsightedness, and nearsightedness.
the degree to which images received by the eyes are not focused on the retina, e.g.: myopia, hyperopia, astigmatism
A defect in the eye's ability to bring light rays to focus on the retina. Refractive errors can be corrected to normal vision.
A defect in the eye that prevents light rays from being brought to a single focus exactly on the retina.
A refractive error, or refraction error, is an error in the focusing of light by the eye and a frequent reason for reduced visual acuity.