Uncorrected low hyperopia in young subjects induces postural instability even in those with clear visual acuity


Autoři: Byeong-Yeon Moon aff001;  Hyun Gug Cho aff001;  Dong-Sik Yu aff001;  Sang-Yeob Kim aff001
Působiště autorů: Department of Optometry, College of Health Science, Kangwon National University, Samcheok-si, Republic of Korea aff001
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224031

Souhrn

Reports have indicated the effect of myopic blur on postural stability. The objective of this study was to investigate the minimum refractive error to significantly affect postural stability through a various levels of hyperopia and myopia induced by ophthalmic lenses. Forty subjects with a mean age of 22.95 ± 2.21 years were enrolled. In all subjects, the subjective refraction with MPMVA (Maximum to Plus Maximum Visual Acuity) was performed to correct refractive error. To induce hyperopia and myopia, spherical lenses of ±1.0, ±2.0, ±3.0, ±4.0, ±5.0 and ±6.0 D were used on top of the trial frame with corrected condition as MPMVA (eyes-open with MPMVA). Under each induced-refractive error condition, general stability (ST) and sway power (SP) in frequencies by each subsystem were measured with Tetrax posturography with firm plates at patient’s upright position, after performed the measurements under the conditions of eyes-open with MPMVA and eyes-closed. ST at eyes-closed was significantly greater than that at eyes-open with MPMVA (p < 0.001). ST was increased significantly for induced hyperopia of -1.0 D (p < 0.001) with decimal visual acuity of 1.07 ± 0.17 and for induced myopia of +3.0 D (p = 0.011) with decimal visual acuity of 0.16 ± 0.09, as compared to that at eyes-open with MPMVA. No significant difference was observed between induced hyperopia of -6.0 D and those at eyes-closed only. SP was increased significantly at low medium-frequencies of the peripheral vestibular signals in induced hyperopia, moreover, hyperopia induced at -6.0 D lenses was significantly different compared to that at eyes-open with MPMVA. Uncorrected low hyperopia in young subjects may lead to postural instability, although they can obtain clear vision. The corrected state of ametropia, especially hyperopia, is a more important factor of appropriate visual input in stable postural adjustment than visual acuity.

Klíčová slova:

Eye lens – Eyes – Fourier analysis – Postural control – Refractive index – Vision – Visual acuity – Myopia


Zdroje

1. Agostini V, Sbrollini A, Cavallini C, Busso A, Pignata G, Knaflitz M. The role of central vision in posture: Postural sway adaptations in Stargardt patients. Gait Posture. 2016;43:233–238. doi: 10.1016/j.gaitpost.2015.10.003 26514831

2. Anand V, Buckley J, Scally A, Elliott DB. The effect of refractive blur on postural stability. Ophthalmic Physiol Opt. 2002;22:528–534. doi: 10.1046/j.1475-1313.2002.00067.x 12477017

3. Oie KS, Kiemel T, Jeka JJ. Multisensory fusion: simultaneous re-weighting of vision and touch for the control of human posture. Cog Brain Res. 2002;14:164–176. doi: 10.1016/s0926-6410(02)00071-x

4. Lord SR: Visual risk factors for falls in older people. Age Ageing, 2006, 35: ii42–ii45. doi: 10.1093/ageing/afl085 16926203

5. Isotalo E, Kapoula Z, Feret P-H, Gauchon K, Zamfirescu F, Gagey P-M. Monocular versus binocular vision in postural control. Auris Nasus Larynx. 2004;31:11–17. doi: 10.1016/j.anl.2003.10.001 15041048

6. Henriksson NG, Johansson G, Olsson LG, Östlund H. Electric Analysis of the Romberg Test. Acta Otolaryngol. 1967;63: 272–279. doi: 10.3109/00016486709123592 5992681

7. Magnusson M, Enbom H, Johansson R, Pyykkö I. Significance of Pressor Input from the Human Feet in Anterior-Posterior Postural Control: The Effect of Hypothermia on Vibration-Induced Body-sway. Acta Otolaryngol. 1990;110: 182–188. doi: 10.3109/00016489009122535

8. Sturnieks D. L.. St George R, Lord S. R.. Balance disorder in the elderly. Neurophysoil Clin. 2008; 38(6): 467–478. doi: 10.1016/j.neucli.2008.09.001 19026966

9. Tahsin Baris Deger, Zeliha Fulden Sarac. The Relationship of Balance Disorders with Falling, the Effect of Health Problems, and Social Life on Postural Balance in the Elderly Living in a District in Turkey. Geriatrics. 2019; 4: E37. doi: 10.3390/geriatrics4020037 31108836

10. Wormald RP, Wright LA, Courtney P, Beaumont B, Haines AP. Visual problems in the elderly population and implications for services. BMJ, 1992; 304: 1226–1229. doi: 10.1136/bmj.304.6836.1226 1515797

11. Khorrami-nejad Masoud, Sarabandi Amin. The Impact of Visual Impairment on Quality of Life. Med Hypothesis Discov Innov Ophthalmol 2016; 5(3): 96–103. 28293655

12. Hashemi H, Fotouhi A, Yekta A, Pakzad R, Ostadimoghaddam H, Khabazkhoob M. Global and regional estimates of prevalence of refractive errors: Systematic review and meta-analysis. J Curr Ophthalmol. 2018;26(4):3–22. doi: 10.1016/j.joco.2017.08.009 29564404

13. Edwards AS. Body instability and vision. J Exp Psychol 1946; 36:526–535. doi: 10.1037/h0059909 20279299

14. Paulus WM, Straube A, Brandt T. Visual Stabilization of Posture. Brain. 1984; 107: 1143–1163. doi: 10.1093/brain/107.4.1143 6509312

15. Sayah DN, Asaad K, Hanssens JM, Giraudet G, Faubert J. Myopes show greater visually induced postural responses than emmetropes. Invest Ophthalmol Vis Sci. 2016; 57: 551–56. doi: 10.1167/iovs.15-17478 26873515

16. Anand V, Buckley JG, Scally A, Elliott DB. Postural stability in the elderly during sensory perturbations and dual tasking: the influence of refractive blur. Invest Ophthalmol Vis Sci, 2003, 44: 2885–2891. doi: 10.1167/iovs.02-1031 12824227

17. Anand V, Buckley JG, Scally A, Elliott DB. The effect of refractive blur on postural stability. Ophthalmic Physiol Opt, 2002: 22: 528–534. doi: 10.1046/j.1475-1313.2002.00067.x 12477017

18. Kim SY, Moon BY, Cho HG. Body Balance Under Ametropic Conditions Induced by Spherical Lenses in an Upright Position. J Phys Ther Sci 2015; 27:615–618. doi: 10.1589/jpts.27.615 25931692

19. Carlson NB, Kurtz D. Clinical procedures for ocular examination. 3rd ed. New York, NY: McGraw-Hill, 2004.

20. Jeon B-J, Cha T-H. The Effects of Balance of Low Vision Patients on Activities of Daily Living. J Phys Ther Sci. 2013;25: 693–696. doi: 10.1589/jpts.25.693 24259832

21. Kohen-Raz R. Application of Tetra-Ataxiametric Posturography in Clinical and Developmental Diagnosis. Percept Mot Skills 1991;73: 635–656. doi: 10.2466/pms.1991.73.2.635 1766798

22. Sunlight Medical Ltd, Israel. TETRAX: FOURIER TRANSFORMATION OF POSTURAL SWAY, http://www.sunlightnet.com/international/html/FourierTransformation.pdf, 1995 (accessed 15 April 2018)

23. Taguchi K. Spectral analysis of the movement of the center of gravity in vertiginous and ataxic patients. Agessologie. 1978;19-B:69–70.

24. Kollmitzer J, Ebenbichler GR, Sabo A, Kerschan K, Bochdansky T. Effects of back extensor strength training versus balance training on postural control. Med Sci Sports Exerc. 2000;32: 1770–1776. doi: 10.1097/00005768-200010000-00017 11039651

25. Lord SR, Clark RD, Webster IW. Postural Stability and Associated Physiological Factors in a Population of Aged Persons. J Gerontol. 1991; 46. doi: 10.1093/geronj/46.3.m69 2030269

26. Benjamin WJ. Borish's Clinical Refraction. 2nd ed. Oxford, UK: Butterworth-Heinemann; 2006.

27. DeWit G. Optic versus vestibular and properoceptive impulses, measured by posturography. Agressologie 1972; 13-C: 79–82.

28. Loughlin P, Redfern M. Spectral characteristics of visually induced postural sway in healthy elderly and healthy young subjects. IEEE Trans Neural Syst Rehabil Eng. 2001;9: 24–30. doi: 10.1109/7333.918273 11482360

29. Takeda N. Autonomic dysfunction in patients with vertigo. JMAJ 2006; 49:153–157.

30. Jones G, Nguyen T, Sambrook PN, Lord SR, Kelly PJ, Eisman JA. Osteoarthritis, bone density, postural stability, and osteoporotic fractures: A population based study. J Rheumatol 1995; 22:921–925. 8587083

31. Ibironke JO, Friedman DS, Repka MX, Katz J, Giordano L, Hawse P, et al. Child Development and Refractive Errors in Preschool Children. Optom Vis Sci. 2011; 88: 181–187. doi: 10.1097/OPX.0b013e318204509b 21150680


Článek vyšel v časopise

PLOS One


2019 Číslo 10