منابع مشابه
Human optical axial length and defocus.
PURPOSE To investigate the short-term influence of imposed monocular defocus on human optical axial length (the distance from anterior cornea to retinal pigment epithelium) and ocular biometrics. METHODS Twenty-eight young adult subjects (14 myopes, 14 emmetropes) had eye biometrics measured before and 30 and 60 minutes after exposure to monocular (right eye) defocus. Four different monocular...
متن کاملDiurnal axial length fluctuations in human eyes.
PURPOSE This study sought diurnal variations of eye length in human subjects, analogous to those reported in laboratory animals. METHODS Seventeen subjects, ages 7 to 53 (median 16) years and mean spherical equivalent refractive error -0.68 D (range, -3.00 to +1.00 D), underwent axial length measurements at multiple times during the day between 7 AM and 1 AM the following day, using partial c...
متن کاملPredicting the effects of optical defocus on human contrast sensitivity.
We used diffraction modulation transfer functions and model eyes to predict the effect of defocus on the contrast sensitivity function (CSF) and compared these predictions with previously published experimental data. Using the principle that optically induced changes in the modulation transfer function should be paralleled by identical changes in the CSF, we used the modulation transfer functio...
متن کاملFrequency-doubling technology perimetry and optical defocus.
PURPOSE The frequency-doubling technology (FDT) perimeter has no provision for introducing corrective lenses, save for the patient's spectacles, and so patients are sometimes tested in the presence of moderate levels of defocus. The effect of defocus on frequency-doubling (FD) sensitivity was determined for both the commercially available instrument and for smaller targets that may be useful in...
متن کاملChoroidal thickness and axial length.
Recently, Ruiz-Medrano et al. did a study to determine choroidal thickness (CT) profile in a healthy population using swept-source optical coherence tomography (SS-OCT). In their study, the patient profiles (age, sex, and spherical equivalent) were collected to identify potential factors associated with CT. However, axial length is another important factor influencing CT, which should be consid...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2010
ISSN: 1552-5783
DOI: 10.1167/iovs.10-5457