Optical Vision Disorders

Reading about and understanding vision disorders is good; However, self-diagnosing can be misleading and harmful. If you suspect that you or a loved one has a vision disorder, please contact your Shah Eye Center doctor.

Your eye specialist at Shah Eye Center will be more than happy to discuss what you suspect, but there is no substitute for an in-depth, examination to determine if and what kind of disorder may exist.

Glossary of Terms

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Myopia (Nearsightedness)

Nearsighted individuals typically have problems seeing well at a distance and are forced to wear glasses or contact lenses. The nearsighted eye is usually longer than a normal eye, and its cornea may also be steeper. Therefore, when light passes through the cornea and lens, it is focused in front of the retina. This area of focus will make distant images appear blurred. There are several refractive surgery solutions available to correct nearly all levels of nearsightedness.

Hyperopia (Farsightedness)

Farsighted individuals typically develop problems reading up close before the age of 40. The farsighted eye is usually slightly shorter than a normal eye and may have a flatter cornea. Thus, the light of distant objects focuses behind the retina unless the natural lens can compensate fully. Near objects require even greater focusing power to be seen clearly and therefore, blur more easily. LASIK, Refractive Lens Exchange and Contact lenses are a few of the options available to correct farsightedness.

Astigmatism

Asymmetric steepening of the cornea or natural lens causes light to be focused unevenly, which is the main optical problem in astigmatism. To individuals with uncorrected astigmatism, images may look blurry or shadowed. Astigmatism can accompany any form of refractive error and is very common. Glasses, contact lenses, corneal relaxing incisions, laser vision correction, and special implant lenses are used to correct Astigmatism.

Presbyopia

Presbyopia is a condition that typically becomes noticeable for most people around age 45. In children and young adults, the lens inside the eye can easily focus on distant and near objects. With age, the lens loses its ability to focus adequately.

Presbyopia is not completely understood. However, it is thought that the lens and its supporting structures lose the ability to make the lens longer during close vision effort. To compensate, affected individuals usually find that holding reading material further away makes the image clearer. Ultimately, aids such as reading glasses are typically needed by the mid-forties. Besides glasses, presbyopia can be dealt with in some ways. Options include monovision and multifocal contact lenses, monovision laser vision correction, and new presbyopia correcting implant lenses.