View clinical trials related to Myopia, Degenerative.
Filter by:To assess the long-term efficacy of the Menicon Z Night orthokeratology contact lens in controlling the progression of childhood myopia
This is a phase III, randomized, double-masked, placebo-controlled, parallel-group, multicenter safety, tolerability, and efficacy study of atropine sulfate 0.01% (OT-101) as an investigational treatment for myopia in pediatric subjects
The purpose of this multicenter randomized clinical trial is to evaluate the adjunctive effect of repeated low-level red-light therapy (RLRL) and orthokeratology (ortho-k) on myopia control in ortho-k non-responders who have undergone ortho-k treatment but were still experiencing fast myopia progression.
Aim of the work PIC in pathological myopia has not been well documented due to difficult in diagnosis we conducted this retrospective study to characterize the clinical features of PIC in high myopic eye. - To show the diagnostic criteria of PIC lesions in high myopic patients. - Find out the prevalence of PIC related 'patchy atrophy' - To determine risk factor for developed PIC in a series of highly myopic patients. - Role of PIC in progression of high myopia. - Calculate the progression rate of PIC related lesion, by the size change during follow-up. - Search about complication of PIC in myopia. Patient and Methods This retrospective observational case series study included patients with high myopia who had been examined and followed-up in the High Myopia Clinic of the Tokyo Medical and Dental University. Approval from Ethics Committee of Tokyo Medical and Dental University was obtained, adhering to the tenets of Declaration of Helsinki. Signed informed consent documentation was obtained from all participants. All study participants underwent a detailed ophthalmologic examination at baseline and at each follow-up visit. The examinations included measurements of best-corrected visual acuity (BCVA) using a Landolt C chart, refraction, slit lamp biomicroscopy, biometry for determination of axial length, (IOL Master; Carl Zeiss Meditec Co, Jena, Germany), fundus examination in medical mydriasis, fluorescein angiography, was performed with and colour fundus photography , and assessment of fundus autofluorescence (TRC-50DX; Topcon, Tokyo, Japan) a or the Heidelberg Spectralis HRA system. Swept source Optical coherence tomography (OCT) used in assessment of the RPE and photoreceptors using a (DRI-OCT;Topcon, Tokyo, Japan). As scanning protocols, 9 mm or 6 mm radial with 12 equal meridian scans were performed. The swept-source OCT device has an A-scan repetition rate of 100 000 Hz, and its light source operates in the wavelength range of 1 μm.
The purpose of the study is to determine the effect of Natural View Multifocal lenses, a soft multifocal lens, on retardation of myopia in an optometric student population. Close up work (i.e. reading, computer work, etc.) is thought to play a factor in the progression of myopia in young adults. The progression should be slowed if not stopped through the use of peripheral defocus lenses (Natural View Multifocal) to change the optics of the eye in order to focus the image on the peripheral retina as opposed to behind it.
Myopia is a global healthy concern, especially the high myopia and pathological myopia among Asian populations. However, its mechanism still remains largely unclear. Recent findings suggested choroidal changes might be related to the development of myopia. This study is to useOCT angiography (OCT-A) to investigate parapapillary choroidal microvasculature change in myopic eyes, and try to find the cause-and-effect relationship between choroidal change and the development of myopia.
To evaluate the safety and tolerability of human retinal pigment epithelial (HuRPE) cell injection subretinal transplantation for atrophy of high myopia macular area, and to explore the maximum tolerated dose (MTD).
Myopia (nearsightedness) is the most common eye disorder. Only second to age, it is the main risk factor for major degenerative eye diseases such as glaucoma, macular degeneration or retinal detachment. Their risk increases with the degree of myopia. Hence, prevention of myopia and slowing its progression is of high relevance. Almost all clinical studies, including two large randomised clinical trials (RCT) were performed in Asia with Asian study participants. The results indicate that atropine eye drops can attenuate myopic progression in children, even in low concentrations thus minimizing unwanted side effects. However, the cumulative evidence is yet not strong enough to recommend their unrestricted use, especially in a Non-Asian population. We therefore intend to set up an adequately powered RCT comparing atropine 0.02% eye drops with placebo to validate previous findings and to test whether this therapeutic concept holds its promise in a European population.
Diurnal variations in the thickness of the choroid have been reported in the literature, and, more recently, the role of the choroid has been studied with respect to its role in myopia (near-sightedness) progression.
Myopia has been increasing in prevalence and severity throughout the world over the last 30 years. Increasing levels of myopia are associated with increased frequency and severity of various ocular pathologies. Slowing myopia progression may help to reduce the future risks of these ocular pathologies. Conventional spectacles and contact lenses correct myopia by moving the central focus of the eye from in front of the retina to on the retina centrally. To varying degrees, these lenses allow the light to focus behind the retina, at varying peripheral retinal locations. These findings have led to efforts to design spectacle and contact lenses which correct peripheral hyperopic defocus, to reduce myopia progression. The consensus theory for how both multifocal contact lenses (MFCLs) and orthokeratology can control myopia progression is that they reduce, eliminate, or reverse relative peripheral hyperopic defocus. Existing published studies on the use of multifocal contact lenses to control myopia in humans have utilized lenses with the distance correction in the center with peripheral plus power to correct the peripheral blur. It is possible that one of the mechanisms responsible for myopia progression control with MFCLs is that when the eye is exposed to an image focused on the retina and simultaneously an image anterior to the retina, that this will suppress axial elongation and myopia progression. This mechanism would not be dependent on whether the anterior image is located in the central area of the retina or the peripheral area of the retina. While there are no published human studies demonstrating the effectiveness of near center MFCLs, this author has presented retrospective data showing no differences in myopia progression between near center and distance center MFCLs. Synergeyes, Inc.'s Duette contact lenses are hybrids of rigid gas permeable (RGP) with a silicon hydrogel peripheral portion or "skirt." They now make their MFCLs in both distance center (DC) and near center (NC) designs. This study will analyze the myopia progression of children after being randomly assigned to wear Duette MFCLs or Duette standard single vision contact lenses over a span of two years. Subjects assigned to the MFCL group will wear a DC lens on one eye and a NC lens on the other and will reverse this lens assignment every six months. Refractive changes will be measured by cycloplegic autorefraction and axial lengths will be measured with a laser interference biometer (Zeiss IOLMaster) at six-month intervals.