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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.

RESULTS

Found (13) clinical trials

Neural Mechanisms Underlying Astigmatism

The presence of astigmatism can lead to substantial reductions in visual performance in a variety of clinical vision measures and functional visual tasks. However, the neural mechanisms underlying the astigmatism remains unknown. The current study recruited three groups (patients with with-the-rule astigmatism and amblyopia, patients with with-the-rule astigmatism but without …

Phase N/A

Influence of Residual Astigmatism on Visual Acuity in Patients Undergoing Cataract Surgery With Trifocal Intraocular Lens Implantation

It will be studied how small residual astigmatisms after cataract surgery degrade the visual acuity of patients in the three focal planes of trifocal IOLs. Not only VA will be studied, but also visual quality through contrast sensitivity curves.

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

Non-comparative Trial Following Participants Implanted Bilaterally With Mini WELL Toric Ready Intraocular Lens for 6 Months After the Second Eye Implant (FUSION)

This is an interventional, multicenter, non-comparative post-marketing clinical investigation in participants implanted bilaterally with the Mini WELL Toric Ready intraocular lens (IOL) for 6 months after the second eye implant. The objective of this study is to evaluate the clinical performance of the Mini WELL Toric Ready IOL, in particular, …

Phase N/A

Clinical Investigation of the Vision-R800 Device.

Randomized, bilateral, cross-over dispensing study of a standard and VR800 refraction and associated spectacle lenses.

Phase

Visual Outcomes for Toric Efficacy Study

This is a crossover study of two types of contact lenses (toric orthokeratology and soft multifocals). Primary aims are to quantify correction of astigmatism, subjective and objective visual performance, aberrometry, peripheral refraction and bacterial bioburden between toric orthokeratology and soft toric multifocal contact lenses.

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

An Evaluation of LASIK SMILE and PRK Surgery in Physicians

The participants 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 participant …

Phase N/A

Advanced Surface Ablation (ASA) vs Laser-Assisted In Situ Keratomileusis (LASIK)

Excimer laser vision correction (LVC) is a widely used procedure to correct nearsightedness, farsightedness, and astigmatism by reshaping the surface of the eye (cornea). Laser-Assisted In Situ Keratomileusis (LASIK) and Advanced Surface Ablation (ASA) and are techniques currently used to prepare the cornea for Excimer LVC. This review is intended …

Phase N/A

Randomized Non-inferiority Trial Comparing SMILE and LASIK

Surgical correction for refractive errors may be performed by a number of procedures. Laser correction involves procedures such as EpiLASIK, LASIK or conductive keratoplasty, while lens based corrections involve the use of phakic intra-ocular lenses. Despite the emergence of other procedures, due to its fast visual rehabilitation and painless postoperative …

Phase N/A