Active clinical trials for "Amblyopia"

"Adaptica" (Padova, Italy) designed a fixed-distance, dark portable tube with power and remote control for the "2WIN: photoscreener. GoChecksKids designed a flash-concentrating case for the iPhone 7+ to more quickly achieve two-axis photoscreen. These devices were compared to confirmatory exams in children and young adults in a remote Burma clinic and in an Alaskan pediatric ophthalmology practice.

Amblyopia is characterized by a reduction in visual acuity, contrast sensitivity, and binocular visual functions. The two main causes of amblyopia are anisometropia and strabismus which alter the synaptic connections between neurons along the visual pathway. Current treatment for amblyopia has indicated that the younger the amblyope, the greater the effect of treatment. The purpose of this study is to determine if standard amblyopia treatment improved visual acuity in adult amblyopes.

Amblyopia, or 'lazy eye', is the reduction in vision usually in one eye, due to abnormal visual development without organic cause. It is a preventable and leading cause of monocular vision loss (prevalence of around 3%) and increases lifetime risk of bilateral visual impairment from 10% in the general population, to 18% in amblyopes. In the UK, vision screening in children aims to detect amblyopia and other undiagnosed visual conditions. Laboratory research suggest that amblyopia could be better detected by modifying standard clinical vision tests to enhance and quantify "crowding". Crowding is the negative effect that surrounding features have on the visibility of a target. Crowding distance and crowding magnitude are considerably greater in amblyopic eyes than in normal healthy eyes. Modifications that should lead to improved amblyopia detection are 1) place letters closer together on a vision chart, 2) define letters by contrast, rather than luminance, and 3) use a new thinner font in the form of numbers, to allow crowding distance in central vision to be measured. In this project, these modifications will be tested in amblyopic children for the first time. Amblyopic children aged 3 to 11 years (n=32) will be recruited from ACPOS (Addenbrooke's Community Paediatric Ophthalmology Service) at ARU. They will have their vision measured with the three modified tests as well as an uncrowded test. The child will view letters and numbers on a computer screen and respond (verbally or by indicating their choice on a matching card). Testing is fun and game-like with breaks for rewards. Results will be compared to standard vision measurement (SLT: Sonksen LogMAR Test) from the child's ACPOS visit. Amblyopic data will be compared to control data from normal healthy children aged 3 to 11 years (n=200), and age-matched children with normal vision (n=16) from ACPOS (false referrals from school screening).

Screening of refractory defect is one of major reason for amblyopy. Photorefraction is a new method with some advantages in treatment of this problem. In this study the investigators are going to compare the results of this surgery in children between 1 to 10 years old with cycloautorefraction in children above 3 years old.

"GoCheck Kids" has added to its iPhone 7+ smart phone with flash concentrator a non-accommodating glow box fixation target. In pediatric eye patients, the "GCK" with glow box is compared to cycloplegic refraction as well as School Bus Accommodation-relaxing skiascopy, "2WIN" photoscreener and "Retinomax."

Amblyopia ("lazy eye") and strabismus (misaligned eyes) are medical eye conditions that combine as the leading causes of preventable vision loss in children. They are irreversible if not detected and corrected by the age of seven, however half of all cases are missed because the conditions do not always manifest themselves and pediatricians are unable to reliably detect the conditions. The current health care system badly needs an accurate and effective approach toward detecting amblyopia and strabismus in preschool children. The study will be conducted in busy, ethnically and racially diverse primary care sites operated by the Kaiser Permanente system and compare the outcomes of testing with a Pediatric Vision Scanner with outcomes the current standard of care.

The purpose for this study is to investigate spectacle compliance and treatment outcome in bilateral and unilateral refractive amblyopia in children age 3 to <10 years old. Specifically, how frequently and for what duration is spectacle wear necessary to maximize best-corrected visual acuity by spectacle correction alone.

The goal of this study is to quantify the improvement in completed ophthalmology referrals and quantify the number of children identified and treated for amblyopia or pre amblyopic strabismus resulting from the implementation of a new referral and tracking system.

Screening of haitian children between the ages of 3 and 6 years old for amblyogenic risk factors with the use of the Spot photoscreener. The photoscreener results will be compared to the complete ophthalmologic evaluation. Primarily, this will allow evaluation of the performance of the spot photoscreener in the haitian children population. Secondarily, this study will gather epidemiological information on vision problems in the haitian children population.

To investigate changes in refractive errors and evaluate clinical outcomes of strabismus surgery in patients with both amblyopia and partially refractive esotropia (PAET).Amblyopic patients with PAET were enrolled. Non-amblyopic patients with full refractive accommodative esotropia (RAET) were included in the study as a control group. Preoperative and postoperative best corrected visual acuity (BCVA), spherical equivalent (SE), astigmatism, stereoacuity and deviations at near and distance were evaluated and statistically compared in the patient group. The mean BCVA, SE, astigmatism were compared between the patient and the control groups.