A Longitudinal Study of Amplitude Changes in Presbyopia

Hofstetter, Henry W.

doi:10.1097/00006324-196501000-00002

Cited by 79 publications

(45 citation statements)

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“…This may suggest that the participants within each age group had similar performance on how much they could accommodate (i.e., MOA), but that the older group had larger variance in how long (i.e., RT and RTI) it took them to achieve a relatively similar performance in MOA. The larger variances found in RT and RTI for the older group were consistent with larger variances of performance in older age groups found in previous studies of the age-related accommodation loss (Duane 1912, Hofstetter 1965, Ramsdale and Charman 1989). On the other hand, the similar variances found in MOA might be ascribed to test protocols, in that each participant was asked to accommodate as much as possible without a set end time.…”

Section: Discussionsupporting

confidence: 90%

“…An apparent explanation is the physiological changes of the eye, including increased lenticular hardness and decreased ciliary muscular tension. While the literature suggests that these changes can be considered as a major contributing factor to the age-related accommodation loss (Donders 1864, Duane 1912, Hofstetter 1965, Ramsdale and Charman 1989, Mordi and Ciuffreda 1998), it is further speculated that the increased reaction time for the accommodation response is likely not primarily due to physiological limitations of the eye, or to peripheral neuromuscular transmission delays, but rather to a delay in central higher-order neural processing time. Specifically, neurons with a signal proportional to viewing distance have been recorded in the mesencephalic reticular formation of the rhesus monkey, just dorsal and lateral to the oculomotor nucleus (Mays 1984, Judge and Cumming 1986).…”

Section: Discussionmentioning

confidence: 99%

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Effects of age on dynamic accommodation

Lockhart

Wen

2010

Ergonomics

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Visual accommodation plays a critical role in one’s visual perception and activities of daily living. Age-related accommodation loss poses an increased risk to older adults’ safety and independence. Although extensive effort has been made towards understanding the effect of age on steady-state accommodation, dynamic aspects of accommodation is still unknown. A study was therefore conducted to investigate age-related dynamic accommodative characteristics utilizing a modified autorefractor. Ten individuals from each of three age groups (i.e., younger group: 20 to 29 years old, middle-aged group: 40 to 49 years old, and older group: 60 to 69 years old) were recruited and their dynamic accommodation responses were examined. The laboratory experiment was designed to assess dynamic accommodation associated with an abrupt change from a constant far target (400 cm, 50 cd/m2) to a near target (70 cm, 100 cd/m2 or 20 cd/m2), which aimed to simulate car dashboard reading behavior while driving. The results of the study indicated that age and target intensity both had a significant impact on dynamic accommodation. These effects were attributed to both the age-related physiological limitation of the eye as well as to central neural processing delay. A method of measuring dynamic accommodation and the implications of the study are discussed.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Effects of age on dynamic accommodation

Lockhart

Wen

2010

Ergonomics

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“…It has been known that there is a linear correlation between age and ampli- subjective accommodative amplitud e based on tude of accommodation up to approximately age 50 (Hofstetter 1965;Charman 1989). We compared our results with those in previous reports.…”

Section: Discussionmentioning

confidence: 85%

An Experimental Study on the Objective Measurement of Accommodative Amplitude under Binocular and Natural Viewing Conditions.

Otake

Miyao

Ishihara

et al. 1993

Tohoku J. Exp. Med.

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“…Thus, the results shown here provide new insights into an eye disorder as common as presbyopia (32,33) .…”

Section: Discussionmentioning

confidence: 65%

Análise da capacidade de acomodação em pacientes présbitas com baixo índice de massa corporal

Damasceno¹,

Damasceno

2013

Rev. bras.oftalmol.

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Purpuse: To determine the correlation between presbyopia and body mass index. Methods: Cross-sectional study involving 1030 patients with visual acuity of 20/20 emmetropy, aged between 36-40 years, 51-55 years and 60-65 years, excluding patients with positive test cover, anisometropy with convergence insufficiency or high correlation convergence / accommodation. Assessment of body mass index of all patients, Results: Cross-sectional study involving 1030 patients with visual acuity of 20/20 emmetropy, aged between 36-40 years, 51-55 years and 60-65 years, excluding patients with positive cover test, anisometropy with convergence insufficiency or high correlation convergence / accommodation. Assessment of body mass index of all patients Conclusion: As demonstrated by statistical analysis there is a significant correlation between low body weight defined as a body mass index below 18.5 and a lower incidence of presbyopia or delay its onset and progression with age.Keywords: Presbyopia; Low body weight; Body mass index RESUMO Dobras de coroide é considerado o achado fundoscópico mais prevalente nos casos de tumor orbitário. São ondulações no epitélio pigmentado da retina, membrana de Bruch, porção interna da coriocapilar e que, em alguns casos, podem acometer a retina neurossensorial, sendo então chamadas de dobras coriorretinianas. Diversas condições, oculares e sistêmicas, cursam com dobras de coroide e devem ser corretamente investigadas e, caso necessário, prontamente tratadas. Nesta revisão iremos abordar os aspectos gerais das dobras de coroide, enfatizando suas características nos seguintes exames de imagem: Retinografia, autofluorescência, angiofluoresceínografia e tomografia de coerência óptica.

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A Longitudinal Study of Amplitude Changes in Presbyopia

Cited by 79 publications

References 0 publications

Effects of age on dynamic accommodation

Effects of age on dynamic accommodation

An Experimental Study on the Objective Measurement of Accommodative Amplitude under Binocular and Natural Viewing Conditions.

Análise da capacidade de acomodação em pacientes présbitas com baixo índice de massa corporal

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