scholarly journals Effect of induced hyperopia on fall risk and Fourier transformation of postural sway

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8329 ◽  
Author(s):  
Byeong-Yeon Moon ◽  
Jae Hyeok Choi ◽  
Dong-Sik Yu ◽  
Sang-Yeob Kim
Keyword(s):  
Visual Acuity ◽  
Fourier Transformation ◽  
Fall Risk ◽  
Postural Sway ◽  
Risk Index ◽  
Refractive Errors ◽  
Body Balance ◽  
Risk Of Falls ◽  
Eyes Open ◽  
Full Correction

Background and Purpose Fall accidents are a social challenge in Korea and elsewhere. Most previous studies have focused on the effects of reduced visual acuity due to myopia on falls and body balance. The objective of this study was to investigate whether uncorrected hyperopia was a major risk factor for falls and to establish whether the risk of falls was absolutely correlated with visual acuity. Methods Fifty-one young subjects with a mean age of 22.75 ± 2.13 years were enrolled in this study. To induce hyperopic and myopic refractive errors, spherical lenses of ±1.0–6.0 D (1.0 D stepwise) were used. Under each induced condition, fall risk index and sway power were assessed via Fourier transformation of postural sway using a TETRAX system. Results The fall risk index for eyes-closed was significantly greater than that of eyes-open with full correction (t = −5.876, p < 0.05). The fall risk index increased significantly from hyperopia induced with −4.0 D lenses (with visual acuity of 0.69 ± 0.32) compared to eyes-open with full correction (F = 3.213, p < 0.05). However, there was no significant change in the induced myopia conditions, despite a drastic decline in decimal visual acuity. Sway power increased significantly in the low-to-medium frequency band derived from the peripheral vestibular system when hyperopia was induced. A significant difference was detected in hyperopia induced with −6.0 D lenses compared to eyes-open with full correction (F = 4.981, p = 0.017). Conclusion An uncorrected hyperopia rather than myopia may increase the risk of falls, although eyes may show normal visual acuity due to the inherent accommodation mechanism. Our findings suggest that the corrected state of refractive errors is more important than the level of visual acuity as the criteria for appropriate visual input, which contributes to stable posture. Therefore, clinicians should consider the refractive condition, especially the characteristics of hyperopia, when analyzing body balance, and appropriate correction of uncorrected hyperopia to prevent falls.

scholarly journals Selected Tools for Assessing the Risk of Falls in Older Women

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Patrycja Bobowik ◽  
Ida Wiszomirska ◽  
Anna Leś ◽  
Katarzyna Kaczmarczyk
Keyword(s):  
Older Women ◽  
Fall Risk ◽  
Risk Index ◽  
Rank Correlation ◽  
Stability Index ◽  
Timed Up And Go ◽  
Balance System ◽  
Functional Reach Test ◽  
Risk Of Falls ◽  
Eyes Open

Background and Aim. This study is aimed at comparing the Functional Reach Test (FRT), Timed Up and Go (TUG), and a modified Unterberger test with stabilographic parameters (Biodex Balance System—BBS), to assess fall risk (FR) in older women. Methods. Fifty-five females were examined (May 2018-June 2019). Stabilographic examinations were performed with eyes open (EO) and closed (EC). An analysis of variance (ANOVA) and Spearman rank correlation were performed to determine the relationships and differences between the above tests. Results. The results of the TUG correlate with the overall stability index (OSI) EO ( r = 0.314 ), medial-lateral stability index (MLSI) EO ( r = 0.297 ), and fall risk index (FRI6-2; r = 0.435 ) in stabilographic examinations and the FRT ( r = − 0.399 ). The results of the modified Unterberger test correlate with MLSI EO ( r = 0.276 ), OSI EC ( r = 0.310 ), and MLSI EC ( r = 0.378 ). There are statistically significant differences between faller and nonfaller groups in TUG ( p = 0.0068 ), FRT ( p = 0.001 ), and MLSI EO ( p = 0.0118 ). Conclusions. The modified Unterberger test and TUG can be considered effective in functional FR assessment in older women. Using at least two different functional tests may improve the assessment of FR.

scholarly journals Evaluation of balance, fall risk, and related factors in patients with fibromyalgia syndrome

2021 ◽  
Vol 67 (4) ◽  
pp. 409-415
Author(s):  
Köksal Sarıhan ◽  
Hülya Uzkeser ◽  
Akın Erdal
Keyword(s):  
Social Isolation ◽  
Fall Risk ◽  
Nottingham Health Profile ◽  
Risk Index ◽  
Control Group ◽  
Healthy Individuals ◽  
Increased Risk ◽  
Study Results ◽  
Significant Difference ◽  
Risk Of Falls

Objectives: In this study, we aimed to evaluate whether fibromyalgia patients had a higher fall risk compared to healthy individuals and to identify its relationship, if there was an increase, with clinical features. Patients and methods: Between March 2018 and September 2018, a total of 50 consecutive female patients with fibromyalgia (median age: 35 years; interquantile range [IQR], 27 to 40 years) and 50 healthy female volunteers (median age: 30 years; IQR, 23 to 40 years) were included in the study. Pain was evaluated with the Visual Analog Scale (VAS), life quality with the Nottingham Health Profile (NHP), balance functions with the Berg Balance Test (BBT), and the risk of falls with a posturography device. Disease activity of fibromyalgia patients was evaluated with the Fibromyalgia Impact Questionnaire (FIQ). Results: The mean fall risk index of the fibromyalgia patients was 45%. The fall risk index was significantly higher (p=0.010) and the BBT scores were significantly lower in the patient group (p<0.001). There was a significant difference in terms of fall risk between the control group and drug-free fibromyalgia patients; however, no significant difference was found between the balance scores of the two groups. In the fibromyalgia group, a weak positive relationship was determined between the fall risk index and the social isolation subscale of the NHP. Conclusion: Our study results showed an increased risk of loss of balance and falls in fibromyalgia patients, compared to healthy individuals. This fall risk increase was also detected in fibromyalgia patients who did not use drugs. These findings suggest a possible relationship between social isolation and an increased risk of falls.

scholarly journals Impact of Single Bout of Physical Exercise on Adolescents’ Strength and Balance Abilities

2018 ◽  
Vol 1 (96) ◽  
Author(s):  
Lina Kreivėnaitė ◽  
Vytautas Streckis ◽  
Sandra Raizgytė ◽  
Asta Lileikienė
Keyword(s):  
Physical Exercise ◽  
High Intensity ◽  
Postural Sway ◽  
High Intensity Exercise ◽  
Body Balance ◽  
Low Intensity ◽  
Eyes Closed ◽  
Single Bout ◽  
Eyes Open ◽  
The Impact

Background. There is evidence of physical exercise effect on the adolescents’ balance and strength; however it is not known how aforementioned variables respond to physical exercise with different loads and intensities. Therefore, the aim of the study was to assess the impact of single bout of physical exercise of different intensity on adolescents’ body balance and muscular strength.Methods. Thirty healthy, physically active 11–13-year-old adolescents were randomly allocated to one of the two groups. Both groups performed single bout of physical exercise of high- or low-intensity climbing up and down-stairs. Postural sway and maximum voluntary contractions (MVC) were assessed before and after physical exercise. Results. No statistically significant impact of low or high intensity exercise was found at adolescents’ MVC. High intensity exercise influenced bigger postural sway with eyes closed compared to eyes open ( p < .05). After high-intensity exercise there was a significantly greater postural sway with eyes closed than with eyes open (p < .05). Conclusions. High and low intensity physical exercise had no impact on the adolescents’ maximum voluntary contraction, whereas high intensity exercise deteriorated body balance with eyes closed.Keywords:  adolescence, physical exercise, MVC, balance

scholarly journals The impact of obesity and age on the risk of falls in elderly women

2021 ◽  
Vol 23 (2) ◽  
Author(s):  
Patrycja Bobowik ◽  
Ida Wiszomirska
Keyword(s):  
Elderly Women ◽  
Age Groups ◽  
Fat Tissue ◽  
Body Balance ◽  
Eyes Closed ◽  
Risk Of Falls ◽  
Eyes Open ◽  
The Impact ◽  
Design Factors ◽  
Falls In Elderly

Purpose: The aim of this study was to examine the effect of obesity and age on body balance disorders in women over 60, especially whether obesity increases the FR in older females and whether age and obesity affect the same stabilographic parameters when it comes to the FR. Methods: The study consisted of 56 inactive females aged 71.77 ± 7.43 (SD). They were divided into groups according to age and obesity. Results: Obesity separately affects FRI12-6, static indicators with eyes closed (OSI EC, APSI EC, MLSI EC), and age affects FRI12-6 and static indices with eyes open (OSI EO, APSI EO). After considering design factors (age and obesity), there were statistically significant differences in OSI EO (p = 0.027), APSI EO (p = 0.034), FRI12-6 (p = 0.0002) between obese and non-obese participants in the age groups. There were no statistical differences between non-obese old and obese-young participants (p = 0.863). The interaction between obesity and age in the FR in static indices and in FRI12-6 (p = 0.73047) was not significant. Conclusions: Age and obesity affect the stabilographic parameters individually, but there is no interaction effect between them. The presence of only one of the above risk factors may increase the FR. Obesity affects stability, while age depends on other factors. If older people are not obese or fit, involutional changes could be reversed. The type of obesity and the location of the fat tissue should be taken into account in FR assessment.

scholarly journals POSTURAL SWAY IN LOWER EXTREMITY AMPUTEES AND OLDER ADULTS MAY SUGGEST INCREASED FALL RISK IN AMPUTEES

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Hamid Bateni
Keyword(s):  
Older Adults ◽  
Young Adults ◽  
Lower Extremity ◽  
Frequency Domain ◽  
Visual Information ◽  
Fall Risk ◽  
Postural Sway ◽  
Proprioceptive Information ◽  
Eyes Closed ◽  
Eyes Open

BACKGROUND: Falls can be detrimental to overall health and quality of life for lower extremity amputees. Most previous studies of postural steadiness focus on quantification of time series variables extracted from postural sway signals. While it has been suggested that frequency domain variables can provide more valuable information, few current studies have evaluated postural sway in amputees using frequency domain variables. OBJECTIVE: To determine time and frequency domain variables of postural sway among lower extremity amputees vs. healthy young and older adult controls. METHODOLOGY: Participants were assigned to 3 groups:  lower extremity amputation (n=6), healthy young adults (n=10), and healthy older adults (n=10). Standing barefoot on a force platform, each individual completed 3 trials of each of 3 standing conditions: eyes open, eyes closed, and standing on a foam balance pad. Time and frequency domain variables of postural sway were computed and analyzed. RESULTS: Comparison of older adults, younger adults, and amputees on the three conditions of standing eyes open, eyes closed, and on foam revealed significant differences between groups. Mean mediolateral (ML) sway distance from the center of pressure (COP), total excursions and sway velocity was significantly higher for amputees and older adults when compared to young adults (p<0.05). Furthermore, power of sway signal was substantially lower for both amputees and older adults. When compared to that of older adults, postural steadiness of amputees was more affected by the eyes closed condition, whereas older adults’ was more affected when sensory and proprioceptive information was perturbed by standing on foam.  CONCLUSION: Our findings showed that fall risk is greater in amputees than in young adults without amputation. Additionally, amputees may rely more heavily on visual information than proprioceptive information for balance, in contrast to older and young adults without amputation.  Layman's Abstract Falls can be detrimental to overall health and quality of life for lower extremity amputees. We evaluated postural sway and concluded that amputees have an increased fall risk and may rely more heavily on visual information for balance than do individuals without amputation. Article PDF Link:https://jps.library.utoronto.ca/index.php/cpoj/article/view/33804/26600 How To Cite: Bateni H. Postural sway in lower extremity amputees and older adults may suggest increased fall risk in amputees. Canadian Prosthetics & Orthotics Journal. 2020;Volume 3, Issue 2, No.4. https://doi.org/10.33137/cpoj.v3i2.33804 Corresponding Author: Hamid Bateni, PhD Physical Therapy Program, School of Allied Health and Communicative Disorders, Northern Illinois University, DeKalb, Illinois, USA.E-mail: [email protected]: https://orcid.org/0000-0001-9083-1817

scholarly journals The comparison of postural balance in elderly active, sedentary and with vestibulopathy.

2015 ◽  
Vol 13 ◽  
pp. 330
Author(s):  
Marcio Rogério De Oliveira ◽  
Luana Da Silva Matos ◽  
Paula Thamirys Chaves Simon ◽  
Rubens Alexandre Da Silva Jr ◽  
Viviane De Souza Pinho Costa
Keyword(s):  
Postural Control ◽  
Postural Balance ◽  
Postural Sway ◽  
Center Of Pressure ◽  
Health Condition ◽  
Large Size ◽  
Risk Of Falls ◽  
Eyes Open ◽  
Vestibular Pathology ◽  
Large Size Effect

Introduction: To be sedentary and have any disease with regard to vestibular pathology can compromise the performance of the postural control and increases the risk of falls. Objective: This study aimed to compare the postural control of elderly active, sedentary and vestibular pathology. Methods:  The sample consisted of 45 elderly separated according to their current health condition: elderly active, sedentary and with vestibulopathy. The postural balance tests were performed in bipedal support, eyes open and the variables measured by the force platform were the center of pressure and average speeds of postural sway in the directions, anteroposterior (A/P) and medial-lateral (M/L). Results: Elderly with vestibulopathy presented significantly poorer postural balance (P <0.05) that active and sedentary group, with large size effect: in mean d >0.80. Conclusion: Elderly with vestibulopathy have poor postural balance that elderly active and sedentary. These findings have any implications for programs of rehabilitation for vestibular disorders. 

scholarly journals Epidemiological Findings of Refractive Errors and Amblyopia among the Schoolchildren in Hatta Region of the United Arab Emirates

2021 ◽  
pp. 1-7
Author(s):  
Salam Chettian Kandi ◽  
Hayat Ahmad Khan
Keyword(s):  
Visual Acuity ◽  
Visual Field ◽  
United Arab Emirates ◽  
Refractive Error ◽  
Screening Program ◽  
Low Vision ◽  
Refractive Errors ◽  
Vision Screening ◽  
Screening Programs ◽  
School Based

<b><i>Introduction:</i></b> Uncorrected refractive errors and amblyopia pose a major problem affecting schoolchildren. We had previously observed that many schoolchildren in the Hatta region presented to the ophthalmology clinic with uncorrected refractive errors and amblyopia, which led us to undertake this research. As per the WHO, the term “visual impairment” can be “low vision” or “blindness.” Based on the presenting vision, “low vision” is defined for children who have vision of &#x3c;6/18 to 3/60 or having visual field loss to &#x3c;20° in the better-seeing eye. Children defined to have “blindness” have presenting vision of &#x3c;3/60 or corresponding visual field of &#x3c;10°. <b><i>Purpose:</i></b> To estimate the magnitude of uncorrected refractive errors and amblyopia among the schoolchildren aged 6–19 years and to assess the efficacy of school-based refractive error screening programs in the Hatta region of the United Arab Emirates. <b><i>Methods:</i></b> An epidemiological, cross-sectional, descriptive study was conducted on the entire student population studying in the government schools of the region. Those who failed the Snellen visual acuity chart test and those who were wearing spectacles were evaluated comprehensively by the researcher in the Department of Ophthalmology of the Hatta Hospital. Data were entered in the Refractive Error Study in School Children (RESC) eye examination form recommended by the WHO, and were later transferred to Excel sheets and analyzed by SPSS. <b><i>Results:</i></b> 1,591 students were screened and evaluated from the end of 2016 to mid-2017. About 21.37% (<i>n</i> = 340) had impaired vision with 20.9% (<i>n</i> = 333) refractive errors, of which 58% were uncorrected. Among the refractive error group, 19% (64 subjects) had amblyopia (4% of total students). The incidence of low vision was 9.5% and blindness was 0.38%. Low vision was found to be 9.5% and blindness 0.38%, taking in to account presenting visual acuity rather than best-corrected visual acuity for defining low vision and blindness. <b><i>Conclusion:</i></b> A significant number of students were detected to have uncorrected refractive errors among the vision impaired group (59%, <i>n</i> = 197) despite a school-based vision screening program in place. Seventy-eight percent of the amblyopia cases (<i>n</i> = 50) were found to be in the 11–19 years age group. Noncompliance with optical corrections was the reason for the high number of cases. A rigorous vision screening program and refractive services, complimented with awareness among parents and teachers, are recommended.

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