In order to understand what astigmatism is, and more specifically regular (versus irregular) astigmatism, let’s first get a basic understanding of what astigmatism is in general. The normal human eye has several structures that are...
Surprisingly, the theory behind Lasik surgery--reshaping the cornea to correct errors in refraction--has been around since the 1800s. Even the laser itself has been in use since the 1970s. Despite that longevity, having a laser shot into your...
Many patients undergo laser vision correction procedures, like LASIK surgery, to eliminate their need for eye glasses or contact lenses. Laser vision correction is a highly successful surgical procedure that boasts a low complication rate,...
First, understand that Lasik is surgery. There are risks with any surgery you undergo. Keeping that in mind, fewer than 1 percent of patients who undergo Lasik surgery have serious complications that are not repairable with further surgery. If...
Astigmatism is a common vision problem. The cause of an astigmatism is a cornea or lens that is irregular in shape--usually the cornea. An astigmatism may be accompanied by near-sightedness or far-sightedness. You may not even know you have this...
Astigmatism is a treatable eye condition that results in blurred vision. It occurs when the front of your eye, which is also called the cornea, or the lens develops a different curvature in one direction. Typically, the cornea is smooth and even...
Astigmatism is a condition of the eye where the eye curvature is imperfect. This causes blurred vision. Astigmatism is not near or far sightedness, although many people have astigmatism along with other vision issues. In the past, people with...
Contact lenses can be used to correct visual acuity in people who are nearsighted (myopic), farsighted (hyperopic) and have irregular corneas (astigmatism). According to the Association of Contact Lens Manufacturers, there are 31 million people in...
Astigmatism, which is an irregular curve of the cornea, is so common that more people have it than don't have it. The University of Michigan's Kellogg Eye Center notes that astigmatism is not a disease, but rather a visual disturbance caused by...
Toric contact lenses correct a common eye condition called astigmatism. The American Optometric Association describes astigmatism as a vision problem caused either by an irregular shaped cornea, which is the clear outer layer of the eye, or...
LASIK (short for laser-assisted in situ keratomileusis) is a surgical procedure for correcting refractive errors of the eye, such as myopia, hyperopia and astigmatism. Because the procedure is relatively painless and vision improvement is achieved...
Amblyopia and astigmatism are two different eye conditions that can occur separately or concurrently, with astigmatism leading to amblyopia. Astigmatism describes a condition in which the cornea, the clear dome-shaped covering over the front of...
Toric contact lenses correct astigmatism caused by a slightly irregular-shaped cornea. They differ from regular lenses in that toric contact lenses have two powers: one to correct astigmatism, the other to correct near-sightedness or...
Humans rely heavily on sight to accomplish nearly every activity of daily living. Eye abnormalities that cause mild to severe vision problems commonly affect children and adults, interfering with school, work and recreational activities. The...
Many people are inflicted with a sight disability known as astigmatism, a condition in which the cornea of the eye is curved irregularly, leading to vision reduction. One of the best solutions to this problem is to obtain special contact lenses...
An infant is considered premature if it's born before 37 weeks of gestation, regardless of birth weight. Immediately after the baby is born, a thorough physical assessment is performed to determine the newborn's health. Some developmental problems...
Contact lenses are a prescription item used to correct vision problems. A contact lens prescription contains more information than an eyeglasses prescription, because the measurements of the eye are very important when fitting contact lenses. When...
How You See (A Short Lesson in a Paragraph) Everything you look at is constantly reflecting rays of light. The rays enter your eyes and fall on the lining at the back of your eye, which is called the retina. Your retina contains receptors cells...
PRK, or photorefractive keratectomy, was invented in the early 1980s and was the first kind of corrective eye surgery to use a laser rather than a blade to remove corneal tissue. PRK uses an excimer laser that sends out a cool beam of ultraviolet...
Astigmatism is an eye problem that optometrists can correct with the right lenses. Get professional tips and advice on eye problems and optometry in this video.