View clinical trials related to Ametropia.
Filter by:The purpose of this study is to compare the results of vision tests that are algorithmically derived and delivered through a virtual reality headset with those delivered through the existing technology standards (eg. Humphrey for field tests). Tests that the researchers will be conducting include vision field perimetry, Amsler, acuity chart, contrast- sensitivity and currently used office tests.
This is a prospective, comparative, randomized, controlled, single-blind, single-surgeon, single-center PMCF clinical study whereby participants undergoing refractive surgery for correction of ametropia will receive a transepithelial PRK (tPRK) and conventional PRK treatment in the contralateral eye. To avoid bias in the clinical outcomes, the two PRK treatment options are randomized to the eyes of the patients based on ocular dominance. In addition, a 1:1 randomization is applied within the tPRK group to eyes with and without end-treatment laser polishing. Both procedures, standard PRK and tPRK, are performed in a one-step procedure. The main difference between the procedures is, that in conventional PRK, the epithelium will be removed using alcohol, whereas in tPRK procedures, the epithelium will be removed by laser ablation.
LASIK is a refractive surgery technique widely used in France. Postoperatively, the classic treatment after LASIK consists of instilling drops to reduce dry eyes. REPADROP® is an innovative eye drops stimulating corneal innervation. To date no study has quantified the improvement in dry eye syndrome and thus the quality of life of patients using REPADROP®.
The purpose of this clinical trial is to evaluate the effectiveness and safety of the multifocal Artiflex Presbyopic intraocular lens.
This is a prospective, comparative, randomized, controlled, open-label, single-surgeon, single-center PMCF clinical study whereby presbyopic patients undergoing refractive surgery will receive a SUPRACOR treatment for the correction in the non-dominant eye and a PROSCAN refractive treatment in the dominant eye to correct for ametropia. The participants will be randomized to either a SUPRACOR regular (100%) or SUPRACOR strong (130%) treatment with a 1:1 ratio.
The primary objective of this study is to evaluate the overall performance of an investigational silicone hydrogel lens when compared to ACUVUE OASYS® with HYDRACLEAR® PLUS (AOHP).
This will be an up to six months, subject-masked, contralateral, parallel-group, randomised, daily wear study. All subjects will wear the Test lens in one eye and the Control lens in the other eye. Data from the first four weeks of Test and Control lens exposure will be used for the FDA 510 (k) submission.
Main objective Show that the equivalent sphere refraction measurements obtained by the SiVIEW software have no significant clinical difference with those obtained by an optometrist expert. Secondary objectives Show that the sphere refraction measurements obtained by the SiVIEW software have no significant clinical difference with those obtained by an optometrist expert. Show that the cylinder refraction measurements obtained by the SiVIEW software have no significant clinical difference with those obtained by an optometrist expert. Show that the visual acuity measurements obtained by the SiVIEW software do not have a significant clinical difference with those obtained by an optometrist expert. Demonstrate that the report delivered for each eye exam by SiVIEW software is consistent and relevant to a vision health practitioner. Show that the differences obtained between two eye examination experts are consistent with those found in the literature.
This subject-masked, randomized, bilateral crossover study will compare the clinical performance and subjective acceptance of the somofilcon A 1 day soft contact lens with the nelfilcon A daily disposable lens when used on a daily wear, daily disposable basis.
The aim of this work is to investigate the clinical performance and subjective acceptance of the comfilcon A asphere contact lens when compared to single-vision spectacles in subjects who have never worn contact lenses and who use digital devices (such as phones, tablets, laptops, desktop computers) for at least 4 hours per day on at least 5 days per week.