This trial is evaluating whether LASIK will improve 3 primary outcomes in patients with Astigmatism. Measurement will happen over the course of Preoperative, up to Month 12.
This trial requires 44 total participants across 2 different treatment groups
This trial involves 2 different treatments. LASIK is the primary treatment being studied. Participants will all receive the same treatment. There is no placebo group. The treatments being tested are not being studied for commercial purposes.
There was no evidence that astigmatism runs in families. Astigmatism in the parents or siblings does not influence astigmatism in the other family members. Astigmatism in the offspring may be related to the environmental factors or to genetic and/or epigenetic factors.
While the amount of astigmatism depends on a variety of factors, this data highlights the impact of the corneal stromal collagen fibers on the refraction axis in the absence of a systemic disorder. Results from a recent clinical trial demonstrate a strong role for the corneal stroma of the cornea on the axis of refraction of the eye.
[A 2005 study(http://www.ncbi.nlm.nih.gov/pmc/articles/PMC23152655/) found that a surgical correction of astigmatism had a 2.5-fold improvement in the patients' subjective visual quality of life and a 50% reduction in the need for eyeglasses. To find active astigmatism clinical trials, use Power(http://www.withpower.com/clinical-trials/astigmatism) to search recent trials by condition, treatment, or location. Astigmatism surgery is not always used as a first-line treatment, but it is used first line or second line for patients with cornea-damaged eyes.
A recent publication showed that 20% of U.S. adults report experiencing astigmatism during the previous 3 months. In addition, a recent study estimates that 18% of Americans have accommodative astigmatism, or myopic astigmatism. An additional 2% of eyes may be hyperopic, or farsighted, which can lead to amblyopia. However, the most frequent complaint related to astigmatism is double vision, which has been called "the biggest mis-diagnosis of any eye disease in the USA.
Astigmatism is a common condition that causes a deterioration in vision. It is sometimes called'sightedness,' though it is not the same as myopia. Many factors can lead to astigmatism, such as genetics, intrauterine growth retardation, early vision problems or visual deprivation during childhood. Astigmatism is also a common cause of a number of diseases in children.\n
For astigmatism that does not meet the criteria for refractive correction, a multifractal toric intraocular lens with posterior pole flap will correct better the corneal astigmatism to ensure the refraction of the eyes is near natural.
Astigmatism is most commonly seen when using a microscope. Its symptoms can be attributed to poor visual acuity due to poor myopia control or to hypermetropia. Astigmatism can be treated with appropriate intraocular lenses.
Astigmatism can be an important factor in the appearance of eye dryness, as well as in the correction of refractive errors, thus it is crucial to determine it early. Eye drop and/or prismatic correction and/or laser surgery must be considered as first-line modalities in severe irregular astigmatism.
This is the first study to report on the common side effects of LASIK and it showed that most of the side effects were transient. Postoperative patients should be evaluated by a specialist eye care provider before surgery.
[For the first time, we report that the visual outcome of myopic patients (corrected by LASIK) with the Nidek EZ 200 laser is good, similar to that found in nonmyopic patients, with a success rate about 93%. There was no difference between the groups in the visual outcome after 1 week or 1 year (p >.05). A slight increase of 0.02 diopters at the end of the evaluation compared to baseline is noticed in patients of the LASIK group of the EZ 200 laser because of the refractive error reduction with refractive surgery. LASIK eye surgery can be performed on most patients with myopia with similar success rates as those of nonmyopic patients.
In a retrospective study of the patients recruited from the American Osteopathic Association's National Eye Institute database, there was no difference in visual correction between the use of LASIK and a control group of non-treated patients.
Most astigmatism is likely to be caused by factors that are not related to refractive error, while some of it is probably related to lifestyle and demographic factors.