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Astigmatism Clinical Trials

A listing of Astigmatism medical research trials actively recruiting patient volunteers. Search for closest city to find more detailed information on a research study in your area.


Found (26) clinical trials

Prospective Evaluation of the Long-term Effectiveness of the Femtosecond Laser-assisted Arcuate Incisions

The purpose of this prospective post-market-clinical-follow-up study is to address the long-term effectiveness of arcuate incisions, in eyes after VICTUS femtosecond laser-assisted astigmatic keratotomy. This study will be conducted at Gemini eye clinic in Zlin, Czech Republic by Dr. Pavel Stodulka who will examine up to 100 eyes who previously ...

Phase N/A

Intrastromal Correction of Ametropia by a Femtosecond Laser

This study evaluates the intrastromal correction of ametropia with a femtosecond laser made by 20/10 PERFECT VISION. This laser generates a beam of ultrashort, infrared pulses which enables very precise cuts in the cornea. By these cuts lamellae of the cornea are separated locally, and in the consequence the curvature ...


Compare Anterior Chamber Biometry in Healthy and Post-LASIK Patients

Accommodation is an action that enables projections of both distant and near objects to be brought into clear focus on the retina through changing of diopteric power of crystalline lens. Although the exact mechanism of accommodation remains inconclusive, most authors agree that contraction of ciliary muscle plays a pivotal role.1, ...

Phase N/A

A Comparison of LASIK Outcomes Using Two Femtosecond Lasers

Patients will have a comprehensive eye examination once they express an interest in the study. This includes a slit lamp examination of the front of the eye and a dilated fundoscopic examination of the back of the eye. If there is any pathology noted that would exclude the patient from ...

Phase N/A

Assessing the Astigmatism Reducing Effect With Toric IOLs in Eyeswith Low Astigmatism

With increasing demands of patients concerning refractive outcome after cataract surgery, toric intraocular lenses (IOLs) that correct corneal astigmatism have been introduced more widely to cataract surgery. Originally, toric IOLs were used mainly for patients with high degrees of astigmatism. Since a couple of years, toric IOLs are available from ...

Phase N/A

Toric Contact Lens Performance Study

This is a prospective, single site, randomized, masked, crossover study. This study will evaluate the ability of toric contact lenses to decrease signs and symptoms of asthenopia and improve digital reading performance. Symptoms and objective near vision outcomes will be measured at baseline and after 1 week of wear with ...

Phase N/A

Performance of Two Toric Silicone Hydrogel Contact Lenses

The aim of this prospective study is to evaluate the clinical performance of Avaira Vitality toric and ACUVUE OASYS for ASTIGMATISM contact lenses after 2weeks of wear in each pair.

Phase N/A

Accuracy of Corneal Astigmatism in Different Region Modes

To analyze the difference between measured total corneal astigmatism and actual corneal astigmatism under different region modes and optimize the region setting.

Phase N/A

Comparison of Comfilcon A Toric Contact Lenses and Samfilcon A Toric Contact Lenses

The objective of this study is to evaluate the subjective acceptance of comfilcon A toric contact lens, compared to samfilcon A toric lens.

Phase N/A

The MORE Study: Manifest vs. Online Refraction Evaluation

Uncorrected refractive errors cause significant economic implications in both high and low income countries in terms of the loss of potential productivity (Williams et al. (2015)). The prevalence of uncorrected refractive errors is, despite of the available clinical services, still huge; visual impairment is in 42 percent of the cases ...

Phase N/A