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Defocus and Choroidal Thickness

2019-05-20 19:54:17 | BioPortfolio

Published on BioPortfolio: 2019-05-20T19:54:17-0400

Clinical Trials [1286 Associated Clinical Trials listed on BioPortfolio]

Myopia Progression With a Novel Extended Depth of Focus Contact Lens

Myopia has been increasing in prevalence and severity throughout the world over the last 30 years. Increasing levels of myopia are associated with increased frequencies and severity of var...

Can Distance Center and Near Center Multifocal Contact Lenses Control Myopia Progression in Children?

Myopia has been increasing in prevalence and severity throughout the world over the last 30 years. Increasing levels of myopia are associated with increased frequency and severity of vario...

The Effect of Myopic Optical Defocus on the Humphrey Matrix 30-2 Test

The purpose of this study is to examine the effect of the myopic optical defocus on the Humphrey Matrix 30-2 test.

Myopia Control With Simultaneous Vision Approach

The investigators hypothesize that the natural process of emmetropization in human is regulated by the equilibrium between the opposite hyperopic and myopic defocus. A sharp focus of retin...

Myopia Control Using Optimized Optical Defocus RCTs

The aims of the study is to evaluate whether the DISC3.5 Plus contact lens will slow myopia progression and axial length growth in myopic children as compared with single vision soft conta...

PubMed Articles [12422 Associated PubMed Articles listed on BioPortfolio]

Gene expression in response to optical defocus of opposite signs reveals bidirectional mechanism of visually guided eye growth.

Myopia (nearsightedness) is the most common eye disorder, which is rapidly becoming one of the leading causes of vision loss in several parts of the world because of a recent sharp increase in prevale...

A global approach to describe retinal defocus patterns.

The popularity of myopia treatments based on the peripheral defocus theory has risen. So far, little evidence has emerged around the questions which of these treatments are effective and why. In order...

Effect of Optical Defocus on Choroidal Thickness in Healthy Adults With Presbyopia.

To investigate changes in subfoveal choroidal thickness (SFCT) induced by retinal defocus in presbyopic adults.

System for on- and off-axis volumetric OCT imaging and ray tracing aberrometry of the crystalline lens.

We present a new instrument for measuring shape and wavefront aberrations of the primate crystalline lens, both on- and off-axis, while simulating accommodation with a motorized lens stretching syste...

Imaging with two skew ideal lenses.

In lens systems, the constituent lenses usually share a common optical axis, or at least a common optical-axis direction, and such combinations of lenses are well understood. However, in recent propos...

Medical and Biotech [MESH] Definitions

Instruments for RETINOSCOPY that determines the refractive state of the EYE, such as the degree of NEARSIGHTEDNESS; FARSIGHTEDNESS; or ASTIGMATISM. In principle, a retinoscope provides a light source to illuminate the RETINA, and then locates the aerial image of the retina in space to obtain an index of the refractive quality of the patient's lens system.

Insertion of an artificial lens to replace the natural CRYSTALLINE LENS after CATARACT EXTRACTION or to supplement the natural lens which is left in place.

Examination of the angle of the anterior chamber of the eye with a specialized optical instrument (gonioscope) or a contact prism lens.

The use of light interaction (scattering, absorption, and fluorescence) with biological tissue to obtain morphologically based information. It includes measuring inherent tissue optical properties such as scattering, absorption, and autofluorescence; or optical properties of exogenous targeted fluorescent molecular probes such as those used in optical MOLECULAR IMAGING, or nontargeted optical CONTRAST AGENTS.

The back two-thirds of the eye that includes the anterior hyaloid membrane and all of the optical structures behind it: the VITREOUS HUMOR; RETINA; CHOROID; and OPTIC NERVE.

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