Abstract:
PURPOSE:Whereas many previous studies have identified the association between sustained near work and myopia, few have assessed the influence of concomitant levels of cognitive effort. This study investigates the effect of cognitive effort on near-work induced transient myopia (NITM). METHODS:Subjects comprised of six early onset myopes (EOM; mean age 23.7 yrs; mean onset 10.8 yrs), six late-onset myopes (LOM; mean age 23.2 yrs; mean onset 20.0 yrs) and six emmetropes (EMM; mean age 23.8 yrs). Dynamic, monocular, ocular accommodation was measured with the Shin-Nippon SRW-5000 autorefractor. Subjects engaged passively or actively in a 5 minute arithmetic sum checking task presented monocularly on an LCD monitor via a Badal optical system. In all conditions the task was initially located at near (4.50 D) and immediately following the task instantaneously changed to far (0.00 D) for a further 5 minutes. The combinations of active (A) and passive (P) cognition were randomly allocated as P:P; A:P; A:A; P:A. RESULTS:For the initial near task, LOMs were shown to have a significantly less accurate accommodative response than either EOMs or EMMs (p < 0.001). For the far task, post hoc analyses for refraction identified EOMs as demonstrating significant NITM compared to LOMs (p < 0.05), who in turn showed greater NITM than EMMs (p < 0.001). The data show that for EOMs the level of cognitive activity operating during the near and far tasks determines the persistence of NITM; persistence being maximal when active cognition at near is followed by passive cognition at far. CONCLUSIONS:Compared with EMMs, EOMs and LOMs are particularly susceptible to NITM such that sustained near vision reduces subsequent accommodative accuracy for far vision. It is speculated that the marked NITM found in EOM may be a consequence of the crystalline lens thinning shown to be a developmental feature of EOM. Whereas the role of small amounts of retinal defocus in myopigenesis remains equivocal, the results show that account needs to be taken of cognitive demand in assessing phenomena such as NITM.
journal_name
Curr Eye Resjournal_title
Current eye researchauthors
Wolffsohn JS,Gilmartin B,Thomas R,Mallen EAdoi
10.1076/ceyr.27.6.363.18190subject
Has Abstractpub_date
2003-12-01 00:00:00pages
363-70issue
6eissn
0271-3683issn
1460-2202journal_volume
27pub_type
杂志文章abstract:PURPOSE:To investigate the biomechanical effect induced by radial keratotomy on outflow facility in paired, enucleated whole porcine eyes. METHODS:Freshly enucleated porcine eyes were perfused at a constant pressure of 10 mm Hg. Radial keratotomy (RK), with a 3.5 mm central clear zone and eight radial incisions, was p...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.16.12.1193.5027
更新日期:1997-12-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688809047029
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journal_title:Current eye research
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更新日期:2002-06-01 00:00:00
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journal_title:Current eye research
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更新日期:2013-07-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:2000-07-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713680600681228
更新日期:2006-05-01 00:00:00
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更新日期:2005-07-01 00:00:00
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pub_type: 杂志文章
doi:10.1080/02713683.2019.1604972
更新日期:2019-09-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:1988-07-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688509017661
更新日期:1985-06-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688709044511
更新日期:1987-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1080/02713683.2018.1540642
更新日期:2019-03-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688709044504
更新日期:1987-12-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688609015097
更新日期:1986-02-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688909000037
更新日期:1989-11-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2020.1812085
更新日期:2020-08-30 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713680490889465
更新日期:2004-12-01 00:00:00
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pub_type: 杂志文章
doi:10.3109/02713683.2012.700757
更新日期:2013-01-01 00:00:00
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journal_title:Current eye research
pub_type: 临床试验,杂志文章
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pub_type: 杂志文章,meta分析,评审
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更新日期:2012-12-01 00:00:00
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pub_type: 杂志文章
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更新日期:1985-01-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:2020-09-16 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:1997-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2004-05-01 00:00:00
abstract:AIM OF THE STUDY:The similarity of many benign intrabulbar lesions to a malignant tumor requires detailed differential diagnostics. However, none of the known methods can be used as the only one to determine the type of lesions. The aim of this study was to determine color Doppler imaging (CDI) markers characteristic o...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1080/02713683.2017.1341534
更新日期:2017-11-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:2009-07-01 00:00:00
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journal_title:Current eye research
pub_type: 杂志文章
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更新日期:2007-10-01 00:00:00
abstract:PURPOSE:Previous studies showed that lutein and zeaxanthin, the major human retinal carotenoids, are concentrated in the macula. In this study, the carotenoids in human macular and peripheral retina and the retinal pigment epithelium (RPE) were analyzed. They were also determined in the rod outer segments (ROS) before ...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.1076/ceyr.19.6.491.5276
更新日期:1999-12-01 00:00:00
abstract::Birefringence variations, seen as regularly spaced altering light and dark rings (bands), have been observed along the length of unfixed, freshly isolated rod outer segments (ROS) of both Rana pipiens and Xenopus laevis. In our hands, the spatial frequency of the banding pattern is from 1.3-1.6u/band in Rana pipiens a...
journal_title:Current eye research
pub_type: 杂志文章
doi:10.3109/02713688409007412
更新日期:1984-11-01 00:00:00