Accommodative microfluctuations and iris contour
نویسندگان
چکیده
منابع مشابه
Accommodative microfluctuations and iris contour.
Mechanical interaction between aqueous humor, iris, and intraocular structures can alter the iris profile from its normal curvature. In particular, significant changes to the iris profile occur during accommodation as the anterior lens movement forces the iris into greater posterior bowing. We extended a previous mathematical model of the anterior segment and investigated the response of this c...
متن کاملTemporal dynamics and statistical characteristics of the microfluctuations of accommodation: dependence on the mean accommodative effort.
Microfluctuations of accommodation have been the subject of many studies. New technological developments now permit us to study the dynamics of the microfluctuations with unprecedented resolution and accuracy. We aim to characterise their temporal statistics for different levels of accommodative effort, using a custom-built aberrometer. We conducted 46 s long measurements on the dominant eye of...
متن کاملObjective depth-of-focus is different from subjective depth-of-focus and correlated with accommodative microfluctuations
In this study, we investigated whether the objective depth-of-focus (DOF) is different from the subjective DOF and whether it correlates to accommodative microfluctuations (AMF). The objective DOF and subjective DOF at 1.5 D accommodative stimulus (AS) level were compared in the same group of subjects. The objective DOF and magnitude of AMF were measured at 5 AS levels from 0 D to 4 D. Results ...
متن کاملThe impact of higher-order aberrations on the strength of directional signals produced by accommodative microfluctuations.
It has been proposed that the accommodation system could perform contrast discrimination between the two dioptric extremes of accommodative microfluctuations to extract directional signals for reflex accommodation. Higher-order aberrations (HOAs) may have a significant influence on the strength of these contrast signals. Our goal was to compute the effect HOAs may have on contrast signals for s...
متن کاملSevere symptoms of short tear break-up time dry eye are associated with accommodative microfluctuations
AIM Validating the hypothesis that accommodative microfluctuations (AMFs) may be associated with severe symptoms in short tear break-up time (BUT) dry eye (DE). METHODS This study included 12 subjects with short BUT DE (age: 49.6±18.3 years). Diagnoses were performed based on the presence of DE symptoms, BUT ≤5 s, Schirmer score >5 mm, and negative keratoconjunctival epithelial damage. Tear e...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2006
ISSN: 1534-7362
DOI: 10.1167/6.5.10