Abstract
Objectives
This study examined the impact of age and magnification on the near visual acuity of dentists in their private practice under simulated clinical conditions.
Materials and methods
Miniaturized visual tests were fixed in posterior teeth of a dental phantom head and brought to 31 dentists in their respective private practice. The visual acuity of these dentists (n = 19, ≥40 years; n = 12, <40 years) was measured in a clinical setting under the following conditions: (a) natural visual acuity, distance of 300 mm; (b) natural visual acuity, free choice of the distance; and (c) loupe and additional light source, if available.
Results
The visual acuity under the different clinical conditions varied widely between individuals. The older group of dentists had a lower median visual acuity value under all clinical conditions. This difference was highly significant for natural visual acuity at a free choice of distance (p < 0.0001). For younger dentists (<40 years), visual acuity could be significantly improved by reducing the eye-object distance (p = 0.001) or by using loupes (p = 0.008). For older dentists (≥40 years), visual acuity could be significantly improved by using loupes (p = 0.0005).
Conclusions
Visual performance decreased with increasing age under the specific clinical conditions of each dentist’s private practice. Magnification aids can compensate for visual deficiencies.
Clinical relevance
The question of whether findings obtained under standardized conditions are valuable for the habitual setting of each dentist’s private practice seems clinically relevant.
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References
Zeiss C (2006) Das Magazin von Carl Zeiss. Innovation 17
Schoeffl H, Lazzeri D, Schnelzer R, Froschauer SM, Huemer GM (2013) Optical magnification should be mandatory for microsurgery: scientific basis and clinical data contributing to quality assurance. Arch Plast Surg 40:104–108
Friedman M, Mora AF, Schmidt R (1999) Microscope-assisted precision dentistry. Compend Contin Educ Dent 20:723–728, 730–731, 735–736; quiz 737
Friedman MJ (2004) Magnification in a restorative dental practice: from loupes to microscopes. Compend Contin Educ Dent 25(48, 50):53–55
Nase JB (2005) Clinical operating microscopes: they're not just for endodontists anymore. Pa Dent J (Harrisb) 72:30–33
Carr GB (1992) Microscopes in endodontics. J Calif Dent Assoc 20:55–61
Hagge MS (2003) Use of surgical telescopes by senior dental students: a survey. J Prosthodont 12:271–279
Meraner M, Nase JB (2008) Magnification in dental practice and education: experience and attitudes of a dental school faculty. J Dent Educ 72:698–706
Bowers DJ, Glickman GN, Solomon ES, He J (2010) Magnification's effect on endodontic fine motor skills. J Endod 36:1135–1138
Donaldson ME, Knight GW, Guenzel PJ (1998) The effect of magnification on student performance in pediatric operative dentistry. J Dent Educ 62:905–910
Forgie AH (2001) Magnification: what is available, and will it aid your clinical practice? Dent Updat 28(125–128):130
Eichenberger M, Perrin P, Neuhaus KW, Bringolf U, Lussi A (2011) Influence of loupes and age on the near visual acuity of practicing dentists. J Biomed Opt 16:035003
Eichenberger M, Perrin P, Neuhaus KW, Bringolf U, Lussi A (2013) Visual acuity of dentists under simulated clinical conditions. Clin Oral Investig 17:725–729
Perrin P, Neuhaus KW, Lussi A (2013) The impact of loupes and microscopes on vision in endodontics. Int Endod J. doi:10.1111/iej.12165
Pointer JS (1995) The presbyopic add. II. Age-related trend and a gender difference. Ophthalmic Physiol Opt 15:241–248
Gilbert JA (1980) The dentist and the aging eye. J Mo Dent Assoc 60:22–24
Adams AJ, Wong LS, Wong L, Gould B (1988) Visual acuity changes with age: some new perspectives. Am J Optom Physiol Opt 65:403–406
Forgie AH, Gearie T, Pine CM, Pitts NB (2001) Visual standards in a sample of dentists working within Scotland. Prim Dent Care 8:124–127
Sia DI, Martin S, Wittert G, Casson RJ (2012) Age-related change in contrast sensitivity among Australian male adults: Florey adult male ageing study. Acta Ophthalmol 91:312–317
Nio YK, Jansonius NM, Fidler V, Geraghty E, Norrby S, Kooijman AC (2000) Age-related changes of defocus-specific contrast sensitivity in healthy subjects. Ophthalmic Physiol Opt 20:323–334
Woo GC, Ing B (1988) Magnification devices for the presbyopic dentist. J Can Dent Assoc 54:447–449
Trotter J (1995) Das Auge: Ein Handbuch für Augenoptiker. Neuauflage ed. Optik Verlag, Trimbach
Brunner E, Domhof S, Langer F (2002) Nonparametric analysis of longitudinal data in factorial experiments. Wiley, New York
Holm S (1979) A simple sequentially rejective multiple test procedure. Scand J Stat 6:65–70
Acknowledgments
The authors would like to thank Lukas Martig (Institute of Mathematical Statistics and Actuarial Science, University of Bern, Switzerland) for the statistical analysis.
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The authors declare that they have no conflict of interest.
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Perrin, P., Ramseyer, S.T., Eichenberger, M. et al. Visual acuity of dentists in their respective clinical conditions. Clin Oral Invest 18, 2055–2058 (2014). https://doi.org/10.1007/s00784-014-1197-2
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DOI: https://doi.org/10.1007/s00784-014-1197-2