Seeing into Old Age: Vision Function Beyond Acuity

Hægerström-Portnoy, Gunilla; Schneck, Marilyn E.; Brabyn, John A.

doi:10.1097/00006324-199903000-00014

Cited by 312 publications

(270 citation statements)

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“…Numerous studies in other countries reported the change of stereopsis with age. However, reports by Allen, 19 Bell et al, 20 HaegerstomPortnoy et al, 21 and Rubin et al 22 all featured the shortcoming that the visual acuity measured at the time of the assessment of stereopsis was not adjusted. In other words, stereopsis may be decreased in the elderly due to the decrease of visual acuity.…”

Section: Discussionmentioning

confidence: 99%

Change of Stereoacuity with Aging in Normal Eyes

Lee

Koo

2005

Korean J Ophthalmol

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Purpose: Stereopsis in normal subjects aged between 7 and 76 years was compared to examine changes in stereopsis with age. Methods: Eighty subjects with no ocular disease were divided into 8 groups by age. Near stereopsis was evaluated with the TNO, Titmus, and Randot tests; distance stereopsis with the Mentor B-VAT II video acuity tester. Results:The results of all 4 tests showed decreased stereopsis with increasing age (p<0.05). Compared to the stereoacuity of 7 to 10-year-old group, both the TNO and distance stereopsis test results were significantly decreased for the 6th, 7th, and 8th decade groups, while both the Titmus and Randot test results were significantly decreased for the 8th decade group (p<0.05). Conclusions: Overall, both near and distance stereopsis decreased with increasing age. Thus, decreased stereopsis should be taken into account when performing the stereopsis test.

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Section: Discussionmentioning

confidence: 99%

Change of Stereoacuity with Aging in Normal Eyes

Lee

Koo

2005

Korean J Ophthalmol

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“…In addition, glare effects are studied in ref. [23] but are related to VA only with a small constant loss in younger subjects and with an exponential increase after age 55.…”

Section: Model Elements Of the Changing Eyementioning

confidence: 92%

Method for Adapting the Grayscale Standard Display Function to the Aging Eye

Ramponi

Badano

2016

J Digit Imaging

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Perceptual linearity of grayscale images based on a contrast sensitivity model is a widely recognized and used standard for medical imaging visualization. This approach ensures consistency across devices and provides perception of luminance variations in direct relationship to changes in image values. We analyze the effect of aging of the human eye on the precept of linearity and demonstrate that not only the number of just-noticeable differences diminishes for older subjects but also linearity across the range of luminance values is significantly affected. While loss of JNDs is inevitable for a fixed luminance range, our findings suggest possible corrective approaches for maintaining linearity.

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“…[15][16][17] West et al 18 reported that if more sophisticated tests of visual function such as contrast sensitivity, glare recovery, and dark acuity tests were used, then up to 60% of elderly subjects assessed with these tests failed them, compared to only 20% of the same cohort who failed standard high-contrast (Snellen) visual acuity tests. Similarly, it is now well recognised that standard clinical tests of a patient's visual field may also underestimate the peripheral visual field problems in this group of patients.…”

Section: Eyementioning

confidence: 99%

Screening for visual impairment in elderly patients with hip fracture: validating a simple bedside test

Squirrell

Kenny

Mawer

et al. 2004

Eye

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Aims 1. To assess the prevalence of visual impairment in those patients who sustain proximal hip fracture after a simple fall. 2. To test the validity of a simple screening test to identify patients with visual impairment. Methods Patients on the orthopaedic rehabilitation ward recuperating from proximal hip fracture were recruited. The nurse screener and examining Ophthalmologist independently assessed the patients' distance visual acuity and visual field to confrontation. In addition, the nurse screener assessed for the presence of cataract in the red reflex and the examining Ophthalmologist performed a dilated slitlamp examination. On completion of the examination, the Ophthalmologist documented the cause(s) of any visual impairment found. Results A total of 89 patients were assessed. In all, 29 patients (33%) could be classified as visually impaired using the United States criteria and 52 patients (58%) had a distance visual acuity of 6/18 or worse in at least one eye. The test reliably identified those patients with visual impairment (sensitivity 94%(75%), specificity 92%(76%)), but was less reliable at identifying those patients with potentially remedial visual impairment (sensitivity 70%(710%), specificity 92%(76%)). Conclusion The level of visual impairment in this group of patients is high and screening for visual impairment in the elderly with a history of falls is justified. We have demonstrated that a suitably trained member of the rehabilitation team can identify over 94% of those patients with impaired vision. We believe this simple test should now be incorporated into the assessment of all patients requiring rehabilitation after a proximal hip fracture.

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Seeing into Old Age: Vision Function Beyond Acuity

Cited by 312 publications

References 0 publications

Change of Stereoacuity with Aging in Normal Eyes

Change of Stereoacuity with Aging in Normal Eyes

Method for Adapting the Grayscale Standard Display Function to the Aging Eye

Screening for visual impairment in elderly patients with hip fracture: validating a simple bedside test

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