View clinical trials related to Myopia.
Filter by:This study investigated the performance criteria over one week of daily wear to determine if the comfilcon A asphere lens (test) performed equivalently to the comfilcon A sphere (control) in terms of measurement and subjective ratings of visual performance.
This study will investigate performance criteria over one week of daily wear to determine if the comfilcon A asphere lens (test) performs equivalently to the comfilcon A sphere (control) in terms of measurement and subjective ratings of visual performance. Both comfilcon A asphere lens (test) and comfilcon A sphere (control) are Coopervision lenses.
This study will investigate performance criteria over one week of daily wear to determine if the comfilcon A asphere lens (test) performs equivalently to the comfilcon A sphere (control) in terms of measurement and subjective ratings of visual performance. Both comfilcon A asphere lens (test) and comfilcon A sphere (control) are Coopervision lenses.
Clinical evaluation of stenfilcon A compared with narafilcon A and delefilcon A This is a total 120 subject, randomized, open label, bilateral wear, two week crossover study (each lens for 1 week) evaluating the clinical performance of stenfilcon A spherical lenses compared to narafilcon A or delefilcon A spherical lenses.
The human cornea is affected by the magnitude and velocity of both internal and external forces because the cornea has both static and dynamic resistance components. Considering these natures of the human cornea, many investigators have tried to demonstrate corneal biomechanical properties to understand these characteristics of the cornea. Corneal biomechanical properties are known to influence the accuracy of measurements in intraocular pressure (IOP) and are recognized as important factor to explain the susceptibility of development of glaucomatous damage. Until recently, the only instrument which enabled the in vivo measurements of the ocular biomechanical properties was ocular response analyzer (ORA, Reichert Ophthalmic Instruments, Depew, NY, USA).8 The ORA has been used to assess the biomechanical properties of the cornea according to the dynamic bidirectional applanation process. A dynamic Scheimpflug analyzer (corneal visualization Scheimpflug technology [Corvis ST], OCULUS, Wetzlar, Germany) has been introduced recently and has become a useful instrument for evaluating corneal biomechanical properties. The dynamic Scheimpflug analyzer captures the dynamic process of corneal deformation caused by an air puff using an ultra-high-speed Scheimpflug camera at a rate of up to 4,330 images per second. Until now, well-organized analysis on the normative data of the corneal biomechanical profiles measured with the dynamic Scheimpflug analyzer for young healthy adults has not been reported yet. Hence, in the present study, we aim to conduct normative data analysis for the corneal biomechanical properties with the dynamic Scheimpflug analyzer in a cohort of young healthy adults in South Korea.
Compare the use of codeine/paracetamol against placebo for pain control after cornea photorefractive keratectomy (PRK).
The objective of the study is to compare the overall subjective comfort profile over 8 hours of lens wear in two groups of habitual soft contact lens wearers (daily disposable hydrogel lenses and frequent replacement lenses) when refitted in to somofilcon A lenses.
Compelling evidence of genetic components in high myopia has been put forward by several studies. Twin cohorts, familial linkage studies and population studies has described at least 10 loci containing genes involved in the disease development. The investigators previously demonstrated novel linkage on chromosome 7q36 and chromosome 7p15 in French families. A new approach consisting of a case-control based population association study is underway in order to recover a high number of myopic subjects avoiding the limitation of familial cases. 1.8 millions polymorphic markers will be compared with emmetropic controls in order to recover loci associated with the disease in the population.
The purpose of this study is to evaluate the thickness accuracy of Laser-assisted in situ keratomileusis (LASIK) flaps created with the LenSx® Laser.
This study is a masked, multi-center, daily wear, monthly replacement, bilateral, randomized, lens blocked (subjects remain in the same lens brand throughout the study) concurrent control study enrolling up to 90 subjects with a study duration of approximately three months. Subjects will be randomized into the study contact lenses in a two to one (2:1) ratio of fanfilcon A lens (test) to enfilcon A lens (control).