Tag: astigmatism

Common Eye Disorders

Common Cornea Disorders

There are some common eye disorders that are caused by the abnormal shape of the eye. One such condition is ectasia, a disorder that causes the cornea to bulge outward. LASIK surgery causes this by weakening the cornea. Other, naturally caused disorders include keratoconus and astigmatism. Keratoconus is caused when the cornea thins, causing it to bulge outward in a cone shape. Astigmatism, on the other hand, is a result of the cornea or lens curving in a different direction.

Common Optic Nerve Disorder

Another eye condition that afflicts many different people is glaucoma. This condition is different from other common conditions in that it is caused by elevated eye pressure. This pressure can result in damage to the optic nerve, which in turn can lead to vision loss.

Signs of an Eye Disorder

Although each eye condition is different and might manifest itself in a different way, there are some common signs that point to an eye disorder. If you notice any type of vision loss or blurring, make an appointment with an optometrist for an eye exam. Other common symptoms associated with these conditions could be eye pain, sensitivity and even headaches and nausea.

Common Eye Disorders

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Diagnosing Astigmatism

Astigmatism is a condition that hundreds of thousands of people face each year. Astigmatism is when the eye is no longer shaped like a sphere and has changed to more like a football. This causes distorted or blurred vision.

Astigmatism can be corrected relatively quickly; there are some basic tests that need to be done to measure the amount of astigmatism one suffers from. Astigmatism is determined by the curvature of the cornea. A patient with astigmatism goes through several tests to not only diagnose the condition but to determine the best course of treatment for the degree of astigmatism the patient suffers.

Tests for Astigmatism:

Standard Vision Chart-

The eye care professional may use a standard vision chart to determine the degree of visual correction is needed. The chart determines how well you can see at a 20 feet distance.

Refraction Tests-

The phoropter or lens machine is used to measure the prescription that is needed. They use the corrective lenses inside the machine to figure out what refraction distance you need for each eye. Sometimes the doctor will use what is called a retinoscope or a hand-held device to measure the prescription more accurately.


The Keratometer is used to measure the steepest and flattest areas of the cornea to tell how much of the vision is affected by the astigmatism. This meter is also used after corrective surgeries to measure how much of the vision has been corrected.


A Topography is a colorized map of the cornea. This can help your doctor determine if you have regular or irregular astigmatism. If you have irregular astigmatism your doctor will need to rule out this is not an early indicator of Keratoconus. Keratoconus is a degenerative condition of the cornea that causes a severe distortion of the cornea shape. Irregular astigmatism can be an early indicator of this condition. When detected early, patients can usually undergo a 30 minute treatment called Holcomb C3-R ® (Cornea Collagen Crosslinking with Riboflavin) that will prevent progressive ision changes.

To learn more about an astigmatism visit www.BoxerWachler.com

To Watch a video about Keratoconus Treatments visit: www.FixesYourKeratoconus.com

For more information about keratoconus visit the American Keratoconus Association

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