How to use astigmatism in a sentence

Looking for sentences and phrases with the word astigmatism? Here are some examples.

Sentence Examples The difference between the focusing powers of these two axes, measured in dioptres, is the astigmatism. People with astigmatism usually need to wear glasses or contact lenses to correct their vision. The LASIK procedure can improve myopic and hyperopic vision with or without astigmatism in acceptable candidates. Contact lenses can be used most advantageously to correct myopia, but can also be used for hypermetropia and corneal astigmatism. You might choose LASIK if you're nearsighted or farsighted, with or without astigmatism. Corrective lenses such as contact lenses or glasses can usually correct vision in people with astigmatism. Deriving from his specialised knowledge of optometry, this cylindrical lens imitates what happens in astigmatism. These Seidel sums correspond to spherical aberration, coma, astigmatism, Petzval curvature and distortion. We have developed an optometer to measure the ocular astigmatism of human eyes and tested its performance. During testing I noted no spherical aberration, no astigmatism, no curvature of field, no barrel or pincushion, and no rolling distortion. For pure astigmatism, a lens is required that has no optical power in the normal meridian but has appropriate curvature in the others. It is a surgical treatment for short-sightedness, some forms of long-sightedness and astigmatism and is carried out by ophthalmic surgeons. Contact lenses can balance the image from both eyes, and correct any irregularities or astigmatism of the eye. The surfaces of the lens or cornea may not be smooth, causing an aberration that results in a streak of distortion called astigmatism. Ordinary soft lenses tend to mould to the astigmatic curve, but special toric soft lenses are available for astigmatism. Whether myopia, hyperopia or astigmatism is present, surgical correction attempts to redirect light rays to accommodate the refractive error. Typical aberrations that can impact imaging performance include astigmatism, chromatic aberration, and spherical aberration. Side vision is distorted and oblique rays of light passing through a spherical lens produce astigmatism. In astigmatism, the refractive power of the eye is different in different meridians. Most refractive surgical procedures were developed to correct nearsightedness, farsightedness and astigmatism. Show More Sentences Similar double curvatures were used for concave lenses, and even more complicated corrections for astigmatism. The glasses do not correct astigmatism, but they are effective against nearsightedness and farsightedness. Those who are farsighted or who have astigmatism also may be helped by LASIK surgery. Examining the camera we noted no astigmatism, curvature of field, rolling distortion, or pincushion distortion. As such, the anastigmat offers an attractive compromise between astigmatism and field curvature. They aren't as effective in correcting some vision problems, including high degrees of astigmatism, as are rigid lenses. Toric contact lenses can correct astigmatism for most people. Lasik can reduce or in many cases eliminate nearsightedness, far-sightedness and astigmatism. Errors of refraction, such as in short and long-sightedness, as well as astigmatism can be recognised and determined. However there are different lens designs available which can also compensate age-induced long-sightedness or astigmatism. The main role of a lens is to correct the vision of people with myopia, astigmatism, hyperopia and presbyopia. The increase in tangential power of the lens and the large amount of aberrational astigmatism can be seen in the diagram. Myopia, hypermetropia and astigmatism are visual problems which need the use of glasses with corrective lenses. The dilation allows your doctor to check for nearsightedness, farsightedness and astigmatism. Like nearsightedness or astigmatism this abnormal shape prevents light from focusing correctly on the retina. This type of lens corrects vision for a single given distance: nearsightedness or farsightedness, with or without astigmatism. Both glasses and contact lenses are used to correct refractive errors such as nearsightedness, farsightedness, astigmatism and presbyopia. The patients were between 18 and 60 years old and had astigmatism or nearsightedness up to minus 7.4 dioptres. Gullstrand contributed to knowledge of the structure and function of the cornea and to research on astigmatism. Prime examples are for images aberrated by astigmatism, defocussing, or image motion. Show More Sentences The only symptom is deterioration of vision due to irregular astigmatism caused by the changing corneal curvature. Characterization of numerous parameters like beam divergence and aberrations such as astigmatism, coma, etc. A minor degree of astigmatism is considered normal and does not need correction. Incidentally, it is comforting to know that, by some divine astigmatism, each one of us is supremely beautiful in the eyes of another! Maximum limits for cyclopegic refractive error and astigmatism correction also apply. In that case I chose to be dyslexic, I chose to be left-handed, I chose to have astigmatism. Hybrid Contact Lenses for irregular astigmatism and keratoconus are for daily wear. Were contact lenses prescribed for severe corneal astigmatism, keratoconus or aphakia? We have disposable soft toric lenses that correct for low to moderate amounts of astigmatism, as well as custom toric lenses that correct for higher amounts of astigmatism. Both nearsighted and farsighted people can have astigmatism. When the lens is distorted, you have lenticular astigmatism. Chennai joins select cities in the country to launch a new laser-driven vision correction procedure for short-sightedness, long-sightedness and astigmatism. The use of aspherical lens elements in both of the front and rear lens groups effectively compensates for distortion, spherical aberration and astigmatism. In astigmatism, although the eye is perfectly healthy, the cornea is curved more like the surface of an egg, with a steep curve in one meridian and a flatter curve in others. Suitable for most people who need glasses, including those who are short-sighted, long-sighted or have astigmatism, laser eye surgery treatment is quick, easy and affordable. Apart from testing the eye, they supply booklets detailing eye care with particular reference to refractive errors such as myopia, hypermetropia and astigmatism. For lower amounts of astigmatism, often standard lens designs can be used. Amblyopia can also result from a major difference in the refraction between the two eyes, such as nearsightedness, farsightedness, or astigmatism. The degree of astigmatism should not exceed more than four diopters. Contact lenses that compensate for astigmatism are known as toric lenses. Show More Sentences The small incision induces minimal postoperative astigmatism. Visual impairment caused by refractive error, amblyopia, strabismus, and astigmatism is a common condition among young children, affecting 5 to 10 percent of all preschoolers. There is a greater number of the population who are farsighted, have astigmatism, or have a combination of astigmatism with either farsightedness or nearsightednes. Finally, a monthly replacement lens for people with astigmatism. Since the flank of the surface astigmatism is clearly flattened at the edges of the progression channel, the wearer perceives the progression channel as being physiologically broader. Under ideal circumstances, it would take an extended period of time for the eye to become accustomed to the degree of correction prescribed for the previously noted astigmatism. At this age, you have more vision correction options than before to address farsightedness, nearsightedness or astigmatism to bring you great visual clarity. The laser-based vision correction surgery corrects nearsightedness, farsightedness, and the blurriness of astigmatism. Grafts can be irregular creating high levels of astigmatism astigmatism or high degrees of ametropia. Nine astigmatism patches have also been provided. This encompasses the treatment of all refractive disorders such as short-sightedness, long-sightedness and astigmatism with the use of an excimer laser. Ophthalmologic examination revealed blue-like scleras, myopia astigmatism, and bilateral partial retinitis pigmentosa. They have also been approved for photorefractive keratectomy, but only to treat certain degrees of nearsightedness and some forms of astigmatism. Through a broad range of lenses, we provide solutions for correcting myopia, hypermetropia, astigmatism and presbyopia to enable people to regain perfect vision. It is able to solve all the fitting problems connected with astigmatism. Adolescent vision screenings may miss farsightedness and astigmatism, according to a study in the July Archives of Ophthalmology. Another type of refractive error is astigmatism. The computer calculates to which depth the Excimer Laser has to work in order to correct certain degrees of myopia, hypermetropia and astigmatism. For myopia, hypermetropia and astigmatism, results are long-term. With its flagship brands Varilux®, Crizal®, Essilor® and Definity®, the world leader in ophtalmic optics ESSILOR International provides a wide range of lenses to correct myopia, hypermetropia, presbyopia and astigmatism. Show More Sentences Sales were enhanced by market share gains of Alcon's AcrySof intraocular lenses, especially premium technologies that provide correction for spherical aberration, astigmatism and presbyopia. The world leader in ophthalmic optical products, Essilor International researches, develops, manufactures and markets around the world a wide range of lenses to correct myopia, hyperopia, presbyopia and astigmatism. With some tweaking, could nearsightedness and astigmatism be treated as well? Eyeglasses, also called glasses or spectacles, lenses set in frames for wearing in front of the eyes to aid vision or to correct such defects of vision as myopia, hyperopia, and astigmatism. He uses surgical eye lasers, or excimer lasers, to treat nearsightedness and astigmatism. The eximer laser is then used to ablate or reshape the interior of the cornea to correct myopia, astigmatism, or farsightedness. The third test in April 1995 at Kilcoe National School, Skibbereen, revealed a condition known as hyperopic astigmatism and treatment was begun. Its range of procedures can treat short sight, long sight and astigmatism. The developer of a breakthrough approach to astigmatism analysis sees a risk in the recent trend to link refractive lasers to corneal topography machines. Sheep eyes exhibit very low hyperopia and little astigmatism. People with astigmatism and cataracts may benefit from a revised Medicare rule extending coverage for the new type of implantable lenses that treats both conditions. Food and Drug Administration approval and is launching in the United States for the treatment of cataract patients with pre-existing corneal astigmatism. According to a company press release, it can measure for myopia, hyperopia, astigmatism, pupil size, pupil distance and anisocoria, in addition to refraction. Many people have slight astigmatism that requires no treatment. Existing lenses are not thin or flat enough to remove distortions, such as spherical aberration, astigmatism and coma, which prevent the creation of a sharp image. Examples from Classical Literature If the subject cannot read up to the twenty-foot line, nearsightedness or astigmatism is indicated. If you don't just see things as they see them, you're troubled with astigmatism. To her it was as though her own eyesight were normal, and astigmatism the rule among other people. That's no reason for calling in the neighbors to rejoice with him because he has astigmatism. This is usually attributed to the presence of an irregular astigmatism situated near the asymmetric meridian. It is designed to ascertain variations in corneal curvature for the correction of corneal astigmatism. Place the card for astigmatism at the distance marked upon it. One of the most common forms of defective vision is astigmatism. To such let me explain that I am suffering from astigmatism. You must see some good oculist about your astigmatism, my dear. A diagram similar to Fig. 394 is used as a test for astigmatism. Find more words! 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What is the opposite of astigmatism? Words that rhyme with astigmatism What is the plural of astigmatism? Translations for astigmatism Use our Sentence Generator Nearby Words astigmatic Asti as though asthmatics asthmatically asthmatic astilbe as time goes by astir ASTM as to as told by 11-letter Words Starting With a as ast asti astig astigm astigma astigmat astigmati astigmatis