Results 221 to 230 of about 12,436 (263)

Effect of accommodation of the lens on ocular pressure

Irish Journal of Medical Science, 1995
In a randomised single blind trial, eye pressures were significantly (p < 0.01) lower in a group (n=33) of subjects who read for 15 minutes than in a control group (n=33).
J, Blake, T, Horgan, P, Carroll, J, Stokes, P, Fitzpatrick   +4 more
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Perceptual detectability of ocular accommodation microfluctuations

Journal of the Optical Society of America A, 1989
When the eye fixates a stationary stimulus, the power of the lens is known to change rapidly and continuously. Although the basic characteristics of this fluctuating activity are known and the influencing factors have been identified, their exact role in the control of accommodation is uncertain. It is thought that, for the fluctuations to be useful, a
B, Winn, W N, Charman, J R, Pugh, G, Heron, A S, Eadie   +4 more
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Changes in ocular dimensions and refraction with accommodation

Ophthalmic and Physiological Optics, 1997
The purpose of this study was to measure the changes in ocular dimensions with accommodation, with particular reference to the radius of curvature of the posterior surface of the crystalline lens. The increase in power of the eye with accommodation is considered to arise primarily from a decrease in the radius of curvature of the anterior surface of ...
L F, Garner, M K, Yap
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Ocular Accommodation in Human Infants

Optometry and Vision Science, 1983
ABSTRACT The present longitudinal investigation evaluated the proficiency of the human ocular accommodation system during the 20‐week period after birth. Fourteen human infants were tested at specific intervals during the age of 2 through 20 weeks.
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Ocular Accommodation, Personality, and Autonomic Balance

Optometry and Vision Science, 1983
ABSTRACT The autonomic nervous system is made up of two subsystems: the parasympathetic (PNS) and the sympathetic (SNS). The balance between these systems regulates bodily functions during routine (PNS‐dominant) and crisis (SNS‐dominant) situations.
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Ocular accommodation in chickens: Corneal vs lenticular accommodation and effect of age

Vision Research, 1986
The avian accommodative response has long been suspected of having a corneal component resulting from contraction of a limbal extension of the ciliary muscle. Efforts to confirm the existence of such a mechanism have been sporadic and the results contradictory.
J G, Sivak, T E, Hildebrand, C G, Lebert, L M, Myshak, L A, Ryall   +4 more
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Role of ocular aberrations in dynamic accommodation control

Clinical and Experimental Optometry, 2009
Accommodation control is mediated by a number of cues, including blur,chromatic aberration and target proximity. Data from wavefront measurements have shown clear shifts in ocular aberrations during increasing accommodative demand, most notably a negative shift in spherical aberration. Work in adaptive optics, where aberrations have been corrected, has
Chin, Sem Sem, Hampson, Karen; id_orcid 0000-0001-9146-9135, Mallen, Edward A.H.   +2 more
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Modification of pattern reversal VERs by ocular accommodation

Vision Research, 1985
The amplitudes and implicit times of the P-1 component of monocular transient pattern VERs elicited by reversing checkerboard targets were measured in 6 conditions: (1) Ocular accommodation (Ao) elicited by minus power ophthalmic lenses; (2) Ao stimulated by minus lenses with the natural pupil of the test eye dilated and replaced by an artificial pupil;
J V, Lovasik, M, Spafford, M, Szymkiw
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Accommodative and Vergence Findings in Ocular Myasthenia

Journal of Neuro-ophthalmology, 2000
Myasthenia gravis (MG) is a neuromuscular disorder that affects skeletal muscles, in particular, the extraocular muscles. Response variability is a hallmark sign. Detailed findings are described in a patient with MG in which the presenting sign was accommodative insufficiency.
J, Cooper, G J, Pollak, K J, Ciuffreda, P, Kruger, J, Feldman   +4 more
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Comparison of changes in ocular aberrations with accommodation and accommodative facility

Acta Ophthalmologica
Aims/Purpose: This study aimed to analyse whether a relationship exists between subjectively measured monocular Accommodative Facility (AF), the magnitude of the revolution‐symmetric Zernike coefficients C20, C40 and C60, and the objectively measured Accommodative Response (AR).Methods: A total of 66 eyes, from 33 healthy young volunteers (26 women and
Maria Mechó García, María Arcas Carbonell, Elvira Orduna Hospital, Ana Sánchez Cano   +3 more
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