Investigation of corneal refractive power with accommodation
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چکیده
Purpose: We evaluated change the of corneal refractive power during accommodation in young
منابع مشابه
Apparent accommodation in pseudophakic eyes with refractive against-the-rule, with-the-rule and minimum astigmatism.
AIM To compare the magnitude of apparent accommodation in pseudophakic eyes with refractive against-the-rule (ATR), with-the-rule (WTR) and minimum astigmatism. Factors associated with apparent accommodation were also examined in each group. METHODS In total, 87 pseudophakic eyes (87 patients) that underwent monofocal intraocular lens (IOL) implantation after uneventful cataract surgery were ...
متن کاملApparent accommodation and corneal wavefront aberration in pseudophakic eyes.
PURPOSE To assess the relationship between apparent accommodation in pseudophakic eyes, multifocal corneal effects, and wavefront aberrations of the cornea. METHODS In 102 eyes of 86 patients who had undergone phacoemulsification and posterior chamber intraocular lens implantation, the amount of apparent accommodation was measured with an accommodometer. The degree of corneal multifocality wa...
متن کاملهمبستگی آستیگماتیسم رفرکتیو، قرنیه‌ای و لنتیکولار در افراد داوطلب جراحی رفرکتیو
Background and purpose: Astigmatism is a common optical dysfunction, effective on various visual outcomes and one of the important criteria of refractive surgery. The aim of present study was to evaluate the correlation between refractive, corneal and residual astigmatism in refractive surgery candidates. Materials and methods: In this cross-sectional descriptive, analytical study, 200 patient...
متن کاملShape and refractive powers in corneal topography.
PURPOSE To compare the relative advantages and disadvantages of four different representations of corneal power--identified as instantaneous, axial, position, and refractive--based on curvature, slope, coordinate position, and focal properties, respectively. METHOD The four types of corneal power were evaluated by examining their interrelationship for 12 hypothetical corneal shapes chosen to ...
متن کاملCorneal power and underwater accommodation in great cormorants (Phalacrocorax carbo sinensis).
In great cormorants (Phalacrocorax carbo sinensis), corneal refractive powers, determined by photokeratometry, ranged between 52.1 diopters (52.1 D) and 63.2 D. Photorefractive reflexes, determined by infrared video photorefraction, indicated that in voluntary dives the cormorants accommodate within 40-80 ms of submergence and with myopic focusing relative to the photorefractor attained when pr...
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تاریخ انتشار 2009