View clinical trials related to Myopia.
Filter by:The aim of this study is to determine if habitual or adapted wearers of stenfilcon A control contact lenses can be refit into test lenses and be successful after one week of daily wear.
The goal of the study is to quantify wavefront aberration profiles of the eye with and without contact lens across the visual field. This will enable us to investigate the impact of the aberration on retinal image quality.
This study is to evaluate the fitting performance of stenfilcon A contact lens (test) compared to narafilcon A contact lens (control).
The high prevalence of myopia - especially in Asian countries - is well documented, as are the sight-threatening complications of high or degenerative myopia. Retinal detachment, glaucoma, vitreal degeneration and focal retinal changes may occur secondary to the progressive axial elongation of the eye with age. Specialty rigid lenses have long been shown to lessen this progression in the pediatric population; orthokeratology (ortho-k) lenses are worn at night and change the corneal topography to correct low to moderate amounts of myopia. Most of the studies on orthokeratology were conducted on Asian children. To the best of the investigators knowledge, no study has been done on African American (AA) children. The investigators' project seeks to investigate the efficacy of ortho-k in slowing axial elongation and myopic progression in AA children compared to that in other races.
Study compares four portable vision measurement and eye-imaging technologies in terms of accuracy and time and ease of use with older adult (ages 40-100) participants in a developing-country setting (India). Specifically, the five portable devices will be measured against the baseline of the traditional eye-examination techniques, including the use of eye charts and phoropters.
The investigators aimed to investigate TGFB1 and LAMA1 gene polymorphisms in children with high myopia in order to determine the genetic basis of large myopic shifts causing severe visual impairment and complications. Seventy-four children with high myopia (≥6 diopters [D]; study group) and 77 emmetropic children (±0.5D; control group) were included. Genetic and polymorphism analyses were performed in the Medical Genetics Laboratory using DNA purified from the patients' blood samples.
Full-thickness macular Hole associated with macular detachment is a one of the maculopathies of high myopia. There is controversy in the primary treatment for this situation. This study will compare the effects of macular buckling versus vitrectomy in a cohort of highly myopic eyes with this situation.
The objective of this study is to investigate the efficacy and safety of soft lens in myopia control.
This is a multi-site, prospective, randomized, controlled, double-masked, four-arm-parallel-group, dispensing study. Each subject will be bilaterally fitted with one of four types of test articles and wear contact lenses of the assigned lens type during the entire course of the study. Test articles will be worn a minimum 8 hours per day and 5 days per week (subjects will be encouraged to wear study contact lenses 10 hours or more per day and 7 days per week) in a daily disposable modality for a minimum of 6 months and up to 1 year for a total of 7 scheduled visits.
This study will compare the on-eye fitting characteristics of three types of contact lenses. Each lens pair will be worn for 30 to 45 minutes before assessment and the results will be compared to mathematically calculated fitting characteristics.