View clinical trials related to Hyperopia.
Filter by:This clinical study aims to investigate the efficacy and safety of PiXL in the refractive correction of low hyperopia.
The purpose of this study is to compare visual acuity between two daily disposable contact lenses.
The aim of the study is to evaluate if the performance of Invigor A is substantially equivalent to Invigor B contact lenses when used in a one month recommended replacement, daily wear modality.
This clinical trial will document the feasibility of the Apioc lens design by assessing which lens shape parameters yield successful on-eye-fit and movement of the Apioc contact lens design and evaluate the subjectively-reported comfort of the Apioc contact lens design.
The objective of this clinical study is to evaluate the safety and effectiveness of intrastromal implantation of the Allotex TCA for improving distance vision in hyperopic subjects. The overall objective with respect to visual outcome is to provide improved vision without the requirement of additional visual aids.
Infants do not usually wear glasses because they usually do not need them to see clearly. Most infants are born with a moderate amount of farsightedness. Most infants then undergo a natural process called 'emmetropization' that reduces the amount of farsightedness. However, up to 10% of infants don't emmetropize and end up with very farsighted prescriptions. Farsighted infants must use extra focusing effort to see clearly, which may make their eyes cross and perhaps cause a "lazy eye". If infants avoid this effort and their vision stays blurred into childhood, they may develop two lazy eyes. Farsightedness in school-aged children makes reading and learning more difficult. New studies in animals and in humans show that infant eyes will emmetropize best if they have just a normal, moderate amount of farsightedness. The infant eye must be in this normal target zone in order to emmetropize. If a baby were given glasses with the full prescription to correct all of his farsightedness, the eyes would also be out of the target zone and would not receive any signal to grow. The best strategy might be to give a partial spectacle correction for the farsightedness, just enough to put them in the zone that is most effective for emmetropization. The purpose of this project is to determine if emmetropization can be enhanced in very farsighted babies. We will give them glasses with a partial correction and accommodative (eye focusing) training. The partial correction is an amount that is less than their full degree of farsightedness but enough to put them in the zone of effective emmetropization. As changes in farsightedness occur, the power of the glasses will be reduced to keep the farsightedness within the target zone. If an infant reaches a normal amount of farsightedness, the glasses will be discontinued. The comparison group will be farsighted babies who receive the current standard of care, namely no correction. The main outcome of the study will be whether there is a significant difference in the decrease of farsightedness between the two groups when the infants are 18 months of age. If emmetropization can be enhanced in very farsighted babies, the risk of developing crossed or lazy eye will be reduced. The lifelong need for spectacles, contact lenses, or refractive surgery for high amounts of farsightedness would also be reduced. Positive results might also make infant eye examinations more common and place a new therapeutic option in clinicians' hands.
Photorefractive keratectomy (PRK) with excimer laser has been used successfully to treat myopia, hyperopia, and astigmatism in adults for over 35 years. Children with high refractive errors that go untreated will develop severe amblyopia. PRK can normalize high refractive errors and potentially improve the visual acuity in affected children. The purpose of this study is to investigate whether children with high anisometropia or isoametropia with amblyopia that are nonresponsive to standard therapy and receive PRK develop better longterm visual acuity.
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 correction of farsightedness using ReLEx SMILE for hyperopia is focus of this investigation. The objective is to evaluate the safety and effectiveness.
Hypermetropia in school-aged children is a pathology which is very common and responds to treatments early. No studies have been found in the literature on the efficancy of the hypermetropia treatments with physiotherapy methods. In our study, it was aimed to investigate the effects of different eye exercises on hypermetropia defects in school age children aged 7-17 years and to determine whether exercise protocols have superiority against each other.