View clinical trials related to Refractive Errors.
Filter by:A refractive surprise can be defined as the failure to achieve the intended postoperative refractive target or the presentation of unexpected and, unwanted post-operative refractive error. It can cause anisometropia or dominance switch and is a source of patient dissatisfaction due to unmet expectations.The best way to manage refractive surprise is to prevent it. The 2017 NICE guidelines on the management of cataracts provide advice on prevention of refractive surprise through accurate biometry, A-constant optimisation, intraocular lens (IOL) formula selection and avoiding wrong lens implant errors.Benchmark standards for NHS cataract surgery dictate that 85% of eyes should be within 1 dioptre (D) and 55% within 0.5D of target spherical equivalent refraction following surgery.
A Study to Evaluate the Safety and Efficacy of the Bausch + Lomb Myopia Control Lens for the Correction of Myopic Ametropia and Slowing the Progression of Myopia in Children
The objective is to compare the refractive parameters of the photorefraction prototype device without cycloplegia with the refractive parameters of reference device, an autorefractometer with and without cycloplegia.
Refractive errors and corneal astigmatism are associated with changes in angle kappa and corneal back elevation at the thinnest point in Pentacam. The purpose of this study is to track: The effect of anterior corneal astigmatism treatment on angle kappa and corneal back elevation.
Demonstrate that refraction measurements from the device agree with refraction measurements from a phoropter within clinically meaningful limits.
This study intends to analyze the characteristics between peripapillary retinal nerve fiber layer thickness and peripapillary area in high myopia with or without glaucoma
The study aim to determine the prevalence of refractive errors in primary school children aged 6-12 in The New Valley , Egypt .
Identification of the correlation between angle kappa , corneal high order aberrations and total eye aberrations in myopic hyperopic and astigmatic patients
Uncorrected refractive error is a leading cause of visual impairment in children and can impact vision, quality of life, and academic performance. Despite Boston Children's Hospital serving patients from a wide range of socioeconomic backgrounds, there are health disparities in access to eyeglasses as a consequence of patients' health insurance. The investigators will examine whether the use of an in-clinic app for 3-D printed glasses reduces disparities in access to eyeglasses for our patients on Medicaid. The intervention will address social determinants of health and improve pediatric health outcomes namely, how and when children having publicly funded health insurance receive eyeglasses. The short-term objectives are (1) to compare the time to receive glasses between publicly funded MassHealth eyeglasses and an in-clinic order of 3D printed glasses (2) to evaluate compliance with glasses wear in these two groups, and (3) to evaluate visual function and quality-of-life outcomes in these two groups. This prospective randomized control study will evaluate barriers to accessing eyeglasses in school-aged children. The investigators will recruit children enrolled in MassHealth and randomize them into two cohorts: (1) the control group will receive MassHealth glasses as per standard of care, through an optical shop of their choosing, or (2) the intervention group will use an app for immediately ordering glasses (paid for by the study) in clinic following their appointment. The investigators will evaluate the time needed to receive eyeglasses, compliance with glasses wear, quality of life, and visual outcomes between the cohorts at one-, three-, and six-month intervals. Through this project, the investigators will not only evaluate, quantify, and bring awareness to disparities in our patient population, but will also look toward finding a solution through the use of a novel application that addresses many of the barriers faced by patients insured through Medicaid.
The purpose of this clinical trial is to confirm the incidence and magnitude of axial length shortening after RLRL therapy in Chinese high myopia children and teenagers.