Astigmatism causes blurry vision that an eye doctor can correct with the proper eyeglass prescription. During an examination, the doctor will have the patient look through a phoropter, a flat machine that sits against the patients face. The doctor...
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...
About 700,000 Americans undergo laser eye surgery annually to correct nearsightedness, farsightedness or astigmatism, and about 0.2 and 2 percent of all patients experience serious complications, notes the American Academy of Ophthalmology....
Keratoconus is a degenerative eye condition that thins the cornea, pushing it into a cone-like shape. The change in cornea shape causes vision problems, including nearsightedness and astigmatism. Causes of keratoconus range from genetic conditions...
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...
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...
LASIK eye surgery, which is a cosmetic surgery, corrects vision problems such as nearsightedness or farsightedness. However, the operation occasionally doesn't completely correct vision problems. Undercorrection during a refractive surgery like...
Double vision, also called diplopia, can be a symptom of serious illness, such as a tumor, blood clot or trauma--or simply a sign of visual fatigue or an incorrect eye glass prescription. Children with disabilities such as Down syndrome or...
A small, pimple-like lump that appears in your child's eyelid or eyelash is similar to a pimple, but is not actually acne. Likely, that lump is either a stye or a chalazion. Sties and chalazia--plural for chalazion--can grow under or inside the...
The cornea, the clear covering over the front of the eye, normally has a dome shape. When keratoconus develops, the dome-shaped part of the cornea thins, causing it to become cone shaped. Because the cornea refracts light, any change in its shape...
Astigmatism occurs when parts of the eye (cornea, lens or the clear cover in the front of the eye) are abnormally curved, causing light to focus improperly on the retina (the part of the eye that converts images and light into brain signals). This...
Amblyopia, also referred to as a lazy eye, is a condition where one eye experiences weak vision. The eyes work in unison to produce clear vision. At times, the brain may only use one eye and ignore the other. The neglected eye begins to weaken,...
There are several different eye defects. Some are present at birth while others develop over time due to aging or disease. In some cases, these problems can be easily corrected. If left untreated, however, some eye defects might lead to loss of...
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...
Eye problems in toddlers can sometimes go undetected, particularly since their functional visual acuity is not tested through reading or schoolwork. In addition, your toddler's limited communication skills might prevent her from telling you...
Astigmatism is a defect in the cornea (substance covering the eye) that can lead to blurry vision.
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...
Genes are the portion of DNA that determine traits such as eye color or height. Genetic disorders may run in families. A child may inherit a specific eye disease such as Stargardt's disease or a complex developmental disorder such as Turner's...
The eyes are sensitive and fragile parts of the human anatomy. They are also one of the most important parts. Over the course of time, they can be subject to injury and conditions that can compromise your vision and lead to treatments. Eye...
Cataracts are an eye condition in which the lens gradually becomes cloudy to the point where vision is compromised. The only treatment other than environmental adaptations such as improved lighting---is surgery. According to the National...
Poor vision is a common health problem in the U.S. Common symptoms of vision problems include blurred vision, blind spots and floaters. Cataracts, glaucoma and macular degeneration are conditions that might cause such symptoms. Certain dietary...
Reading is a complicated activity that requires coordination between the two eyes, muscle control to fixate on words while moving across a line of print and visual acuity. It also involves accommodation abilities to focus at different distances...
Eye redness occurs when blood vessels become enlarged and dilated, according to the National Institutes of Health. Several factors may lead to this condition including an allergic reaction, infection, trauma, dryness---including from computer...
The eyes are responsible for receiving light and sending that information in the form of neurological signals to the brain. Problems in one eye can lead to amblyopia, also known as lazy eye. Amblyopia can be subtle but, if not treated in time, can...
About Astigmatism of the Human Eye Overview Astigmatism is a common eye condition, but severe forms can cause blurred vision. Astigmatism usually coexists with one or more other eye problems, such as myopia or hyperopia. It is easily diagnosed...
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 results when your cornea or the lens inside your eye is irregularly shaped. When the curvature of the lens or the cornea is uneven, light cannot focus properly on the retina, causing blurred vision. This eye condition may be mild and...
Keratoconus is a rare vision disorder that affects the shape of the eye. As of early 2011, the cause is unknown. At its worst, the condition causes the cornea to bulge, thin and shape-shift images into barely recognizable blobs. Remedies include...
There are various visual disturbances that can affect the eye. This includes blurry vision, partial sight loss, seeing objects that are not really there and double vision. These symptoms can happen in both eyes or just one. The types of symptoms...
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.