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The purpose of this study is to evaluate and compare the eyeball elongation in high myopic children using partial correction orthokeratology and single-vision spectacles.
Orthokeratology (ortho-k) has been shown to have strong potential for retardation of myopic progression in low myopes. To date, clinical experience has shown the technique to be less effective in achieving full myopic reduction in high myopes. Would myopic control be possible for high myopes undergoing partial correction ortho-k treatment?
A randomized, longitudinal study is designed to investigate the efficacy of partial correction ortho-k in retardation of myopic progression in high myopic children. Eye growth in terms of axial length elongation in children wearing ortho-k and over-spectacles (to correct residual refractive errors) (study group) and those wearing single-vision spectacles (control group) will be evaluated and compared.
Allocation: Randomized, Control: Uncontrolled, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Investigator), Primary Purpose: Treatment
Orthokeratology lenses, DreamLite lenses, Single-vision spectacle lenses
School of Optometry, The Hong Kong Polytechnic University
Hong Kong SAR
The Hong Kong Polytechnic University
Published on BioPortfolio: 2014-07-23T21:13:20-0400
The primary aim of this study is to evaluate and compare the eyeball elongation in children wearing orthokeratology lenses and single-vision spectacles.
The purpose of this study is to evaluate cholesterol sorption by Air Optix® Aqua lenses compared to ULTRA lenses after 30 days of wear.
The purpose of this study is to explore overall vision with BIOFINITY® ENERGYS™ contact lenses as compared to BIOFINITY® contact lenses after one week of wear.
To investigate a possible benefit of Orthokeratology contact lenses to improve uncorrected visual acuity of keratoconus patients
In Hong Kong, approximately 80% of children are myopic by the end of childhood. There is intense interest currently in the potential role of peripheral defocus as a clinical treatment to s...
To assess the visual acuity and compliance with the use of orthokeratology lenses (OrthoK) in school children.
To investigate the changes in the quality of life and behaviors in children before and after wearing orthokeratology lenses and to analyze the potential impact of orthokeratology lenses on children's ...
In the last decades contact lenses have conquered a first place in curing refraction errors as well as treatment option in the medical field especially for corneal diseases. The reason is the advanced...
Recent case reports have indicated that intraocular lenses may be discoloured by systemically or locally applied fluorescein. Since very few data are available on the susceptibility of intraocular len...
Comparative analysis of visual outcomes, reading skills, contrast sensitivity, and patient satisfaction with two models of trifocal diffractive intraocular lenses and an extended range of vision intraocular lens.
To compare visual and contrast sensitivity (CS) outcomes, reading skills, and spectacle independence in patients implanted with two models of trifocal intraocular lenses (IOLs) or an extended range of...
Lenses, generally made of plastic or silicone, that are implanted into the eye in front of the natural EYE LENS, by the IRIS, to improve VISION, OCULAR. These intraocular lenses are used to supplement the natural lens instead of replacing it.
Artificially implanted lenses that direct light toward distant and near focal points allowing clear vision for a range of distances.
Artificial implanted lenses.
Lenses designed to be worn on the front surface of the eyeball. (UMDNS, 1999)
An alternative to REFRACTIVE SURGICAL PROCEDURES. A therapeutic procedure for correcting REFRACTIVE ERRORS. It involves wearing CONTACT LENSES designed to force corrective changes to the curvature of the CORNEA that remain after the lenses are removed. The effect is temporary but is maintained by wearing the therapeutic lenses daily, usually during sleep.
Pediatrics is the general medicine of childhood. Because of the developmental processes (psychological and physical) of childhood, the involvement of parents, and the social management of conditions at home and at school, pediatrics is a specialty. With ...