Astigmatism

What you need to know

The eye

The eye is the organ associated with normal vision. A healthy eye uses light to project an image to the pupil which focuses on the cornea. From there, the light moves through the lens and focuses on the retina. Then, the receptors present (rods and cones) react to pigments that cause synapses. These signals move through the eye to the optic nerve. It then travels to the brain (Goldstein, 2014).


An Astigmatic eye is a functional eye. It is caused by a curvature of the anatomy of the eye (Mayo, 2016). This causes light to refract on multiple areas of the retina. This makes the vision impaired.


Astigmatism has an affect on the perception of a subject. A healthy eye focuses light exactly and precisely, giving a clear image of the subject. Because of the structure of an astigmatic eye, the light doesn't focus which can give the subject a different view.

Symptoms & Treatment

Symptoms

There are several symptoms of Astigmatism. The first one is blurred vision. Another is eye strain and eye fatigue. Headaches have been linked to Astigmatism as well.

Treatment

There are simple treatment options for Astigmatism. Its symptoms can be corrected with eyeglasses, weighted contacts, or refractive laser surgery.

References

Astigmatism Test Info (2016). Retrieved from: http://www.astigmatismtestinfo.com/uncategorized/considering-lasik-after-your-astigmatism-test/


Goldstein, E.B. (2014). Sensation and Perception, 9th edition. Belmont: Wadsworth.


Mayo Foundation for Medical Education and Research (2016). Retrieved from: http://www.mayoclinic.org/healthy-lifestyle/adult-health/multimedia/anatomy-of-the-eye/img-20008178


The Eye Practice (2015). Retrieved from: http://www.theeyepractice.com.au/optometrist-sydney/treating-astigmatism-with-laser-eye-surgery