Common Vision Terms and What They Mean

Many people with imperfect eyesight know exactly what their vision condition is called. You may hear them say something like, “I am nearsighted.” or “I have astigmatism” But, fewer patients know what really causes their refractive errors or even what these medical terms mean. Many people have also heard of a procedure called LASIK but are not sure of whether it may treat their particular issue or if it is the right procedure for them.

To make things more confusing, a few of the terms appear counterintuitive. (An individual is farsighted, but she has difficulty seeing things close to her.) Furthermore, physicians refer to refractive errors as clinical conditions that the patient may be unacquainted with. In this Guide, we clean up confusion such as:

What is the distinction between presbyopia and hyperopia? They’re all due to irregularities in the form and angle of light as it moves through the eye.

Light enters the eye and is concentrated from the cornea along with the lens on the retina. The retina then sends the picture to the brain through a nerve called the optic nerve. If you have ever concentrated a camera lens or a projector picture, you are aware that the smallest change of space makes the distinction between a crystal clear or fuzzy picture. Refractive errors encompass various methods by which those distances could be imperfect in our own eye. The world of ophthalmology and Lasik eye surgery Michigan is filled with complex terminology and may come off as very confusing. In reality, it is all very simple and we will dive into these common vision terms below

Clinical expression: myopia

Common expression: nearsighted, shortsighted

This term refers to a condition in with the eyes are more or much more curved than usual. This change in shape causes light to concentrate far too early, which makes it come to focus before it strikes the retina. When this happens, items that are close-up appear to be in focus, but things farther away are very fuzzy. Myopia is a very common vision problem and many people who wear glasses suffer from this condition.

Clinical expression: hyperopia

Common expression: farsighted

Hyperopia or farsightedness refers to a condition in which the eyes are thinner or shorter than they should be causing light rays to concentrate too late. When this happens, light rays coming into the eye come to a focal point after striking the retina, meaning when they hit the retina they are not in focus. To people with hyperopia, distant objects are apparent and can be easily seen. However, objects that are close-up may appear somewhat fuzzy. Hyperopia is also an extremely common condition along with myopia. May people who wear glasses especially reading glasses at a young age often suffer from this condition. Michigan Lasik eye surgery is commonly used to correct this condition.

Clinical expression: presbyopia

Common expression: aging eyes

Since the symptoms are alike, presbyopia is occasionally confused with hyperopia although the conditions themselves are drastically different. Patients with presbyopia also have trouble focusing on images that are close up just as those with hyperopia. Presbyopia can happen along with nearsightedness, farsightedness, and astigmatism at the same time.

The cause of presbyopia is very different than that of hyperopia. Those who are young and require reading glasses often suffer from hyperopia but those who begin experiencing poor vision up close in there early to late 40s are suffering from presbyopia. Presbyopia is simply caused by the natural aging process. As we get old, some peoples eye muscles begin to lose their strength and this results in the loss of one’s ability to focus on objects near to them.

Clinical expression: Astigmatism

Common expression: Astigmatism

The clinical expression is often used by the laymen to describe an irregularly-shaped eyeball. Perhaps the eyeball is more round than it should or extra football shaped even. Primarily, it usually means that the whole surface of the cornea or the lens isn’t perfectly curved. Comparable to an older, warped window, an improperly shaped lens results in an unclear visual picture for those suffering from astigmatism.

A method performed along with LASIK, known as monovision can correct presbyopia. But not everybody is a candidate for this treatments, also an ophthalmologist must evaluate numerous factors to ascertain a patient’s candidacy for monovision Lasik. Furthermore, a patient has to be at least 18 decades old and possess a steady eyeglass prescription for a single year.

Monovision is a form of Lasik in which one eye is set to see up close while the other eye is set to see at a distance. Most Lasik eye surgery Michigan patients are given a two-week trial in which they wear contact lenses that simulate the results of monovision Lasik. This is done as monovision tends to have a “love-hate” relationship with patients. Many patients really do not like the way they see during their 2-week trial and don’t opt for the procedure. An equal number of patients, on the other hand, love the experience and feel that monovision really works well with their brain.

How Does Lasik Work?

Lasik, or Laser-Assisted In Situ Keratomileusis, is a form of laser eye surgery used to correct refractive error. Lasik begins by cutting a flap in the cornea exposing the stoma of the eye. Using an excimer laser, the surgeon then fires light pulses into the eye. The amount of pulses depends on the prescription of the patient. These light pulses blast away microscopic amounts of tissue reshaping the eye.

By reshaping the eye, light is no longer improperly refracted and a patient’s vision is restored to 20-20 or even better in many cases.

Every patient and her conditions are somewhat different. Talk to an experienced LASIK specialist at the Yaldo Eye Center to find out if laser vision correction is the right option for you.

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