OCULAR BIOMETRIC STUDY DURING ACCOMMODATION
نویسندگان
چکیده
منابع مشابه
Ocular biometric characteristics during the menstrual cycle
PURPOSE To determine the ocular biometric characteristics during the menstrual cycle using the optical low-coherence reflectometry (OLCR) biometry. METHODS Twenty-two healthy women between the ages of 19 and 36 years with regular menstrual cycles were enrolled in this prospective study. Subjects with irregular menstrual cycles, those taking contraceptive pills, those with a history of ocular ...
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Purpose: There are a few researches regarding the effects of Islamic fasting on visual system. The aim of this study was to investigate the effects of Ramadan fasting on the amplitude of accommodation (AA), near point of convergence (NPC), positive and negative fusional vergences (PFV and NFV, respectively) in visually healthy fasters. Methods: AA, NPC, PFV and NFV at far (6m) and near (40cm) w...
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where d is the distance between the center of masses of the two symmetrical halves of the CSAs. Critical to the use of this theorem is the determination of the exact center of mass of each CSA (6, 7). The authors did not specify how the center of mass was determined nor the accuracy, precision, and variation of this measurement in the bovine lens. There are additional significant deficiencies w...
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During accommodation, mammalian lenses change shape from a rounder configuration (near focusing) to a flatter one (distance focusing). Thus the lens must have the capacity to change its volume, capsular surface area, or both. Because lens topology is similar to a torus, we developed an approach that allows volume determination from the lens cross-sectional area (CSA). The CSA was obtained from ...
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When viewing natural scenes saccadic eye movements are used to position retinal images of interest on the fovea, while vergence eye movements act to minimise retinal disparity and maintain a single binocular view of the target. Despite these disruptions to the retinal image, we perceive a stable visual world due to suppression of the magnocellular visual pathway which processes low spatial freq...
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ژورنال
عنوان ژورنال: International Journal of Medical and Clinical Research
سال: 2012
ISSN: 0976-5530,0976-5549
DOI: 10.9735/0976-5530.3.4.150-153