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Visual acuity with computer simulated and lens-induced astigmatism

Treść / Zawartość
Identyfikatory
Języki publikacji
EN
Abstrakty
EN
The relationship between spherical and astigmatic refractive errors and their associated visual acuity is investigated in this work by means of two different approaches. In the first one, different refractive errors were induced in normal subjects by trial lenses. In the second one, defocused images were simulated numerically by the optical transfer function of a model eye and then judged by the same subjects. The amount of defocus (measured in terms of the modulus of the dioptric power vector) necessary to reduce the visual acuity to 0.1 logMAR and to 0.4 logMAR was computed with each method and then compared. We found that the visual system is clearly more tolerant to lens-induced defocus than for the computer simulated one. However, no significant differences in visual acuity were found for astigmatism of the same power but different axes in each method.
Czasopismo
Rocznik
Strony
521--531
Opis fizyczny
Bibliogr. 25 poz., rys., tab.
Twórcy
autor
  • AJL Ophthalmic S.A., 01510 Miñano, Spain
autor
  • Departamento de Óptica, Universitat de València, 46100 Burjassot, Spain
autor
  • Departamento de Óptica, Universitat de València, 46100 Burjassot, Spain
autor
  • Centro de Tecnologías Físicas, Universitat Politècnica de València, 46022 Valencia, Spain
autor
  • Departamento de Óptica, Universitat de València, 46100 Burjassot, Spain
Bibliografia
  • [1] PETERS H.B., The relationship between refractive error and visual acuity at three age levels, American Journal of Optometry and Archives of American Academy of Optometry 38, 1961, pp. 194–198.
  • [2] BOLTZ R.L., MANNY R.E., KATZ B.J., Effects of induced optical blur on infant visual acuity, American Journal of Optometry and Physiological Optics 60(2), 1983, pp. 100–105.
  • [3] RAASCH T.W., Spherocylindrical refractive errors and visual acuity, Optometry and Vision Science 72(4), 1995, pp. 272–275.
  • [4] BRADLEY A., THOMAS T., KALAHER M., HOERRES M., Effects of spherical and astigmatic defocus on acuity and contrast sensitivity: a comparison of three clinical charts, Optometry and Vision Science 68(6), 1991, pp. 418–426.
  • [5] REICH L.N., EKABUTR M., The effects of optical defocus on the legibility of the Tumbling-E and Landolt-C, Optometry and Vision Science 79(6), 2002, pp. 389–393.
  • [6] REMÓN L., TORNEL M., FURLAN W.D., Visual acuity in simple myopic astigmatism: influence of cylinder axis, Optometry and Vision Science 83(5), 2006, pp. 311–315.
  • [7] SMITH G., JACOBS R.J., CHAN C.D.C., Effect of defocus on visual acuity as measured by source and observer methods, Optometry and Vision Science 66(7), 1989, pp. 430–435.
  • [8] DEHNERT A., BACH M., HEINRICH S.P., Subjective visual acuity with simulated defocus, Ophthalmic and Physiological Optics 31(6), 2011, pp. 625–631.
  • [9] OHLENDORF A., TABERNERO J., SCHAEFFEL F., Visual acuity with simulated and real astigmatic defocus, Optometry and Vision Science 88(5), 2011, pp. 562–569.
  • [10] APPLEGATE R.A., BALLENTINE C., GROSS H., SARVER E.J., SARVER C.A., Visual acuity as a function of Zernike mode and level of root mean square error, Optometry and Vision Science 80(2), 2003, pp. 97–105.
  • [11] WEBSTER M.A., GEORGESON M.A., WEBSTER S.M., Neural adjustments to image blur, Nature Neuroscience 5(9), 2002, pp. 839–840.
  • [12] DE GRACIA P., DORRONSORO C., SAWIDES L., GAMBRA E., MARCOS S., Experimental Test of Simulated Retinal Images Using Adaptive Optics, Adaptive Optics: Methods, Analysis and Applications, San Jose, California United States, October 13–15, 2009, article JWB4
  • [13] Visual acuity test types. Test charts for clinical determination of distance visual acuity. Specification, BS 4274-1:2003.
  • [14] WHATHAM A.R., MERMOUD C., DÉRUAZ A., GOLDSCHMIDT M., ZESIGER P., SAFRAN A.B., Computer-based measurement of letter word acuity, Ophthalmic and Physiological Optics 26(2), 2006, pp. 156–168.
  • [15] LEGRAS L., CHATEAU N., CHARMAN W.N., A method for simulation of foveal vision during wear of corrective lenses, Optometry and Vision Science 81(9), 2004, pp. 729–738.
  • [16] THIBOS L.N., HONG X., BRADLEY A., APPLEGATE R.A., Accuracy and precision of objective refraction from wavefront aberrations, Journal of Vision 4(4), 2004, pp. 329–351.
  • [17] WATSON A.B., YELLOTT J.I., A unified formula for light-adapted pupil size, Journal of Vision 12(10), 2012, article 12, pp. 1–16.
  • [18] PLAINIS S., KONTADAKIS G., FELONI E., GIANNAKOPOULOU T., TSILIMBARIS M.K., PALLIKARIS I.G., MOSCHANDREAS J., Comparison of visual acuity charts in young adults and patients with diabetic retinopathy, Optometry and Vision Science 90(2), 2013, pp. 174–178.
  • [19] VINAS M., SAWIDES L., DE GRACIA P., MARCOS S., Perceptual adaptation to the correction of natural astigmatism, PLoS ONE 7(9), 2012, article e46361.
  • [20] ATCHISON D.A., HUANQING GUO, CHARMAN W.N., FISHER S.W., Blur limits for defocus, astigmatism and trefoil, Vision Research 49(19), 2009, pp. 2393–2403.
  • [21] DE GRACIA P., DORRONSORO C., GAMBRA E., MARIN G., HERNÁNDEZ M., MARCOS S., Combining coma with astigmatism can improve retinal image over astigmatism alone, Vision Research 50(19), 2010, pp. 2008–2014. Visual acuity with computer simulated... 531
  • [22] DE GRACIA P., MARCOS S., MATHUR A., ATCHISON, D.A., Contrast sensitivity benefit of adaptive optics correction of ocular aberrations, Journal of Vision 11(12), 2011, article 5, pp. 1–10.
  • [23] VINAS M., DE GRACIA P., DORRONSORO C., SAWIDES L., MARIN G., HERNÁNDEZ M., MARCOS S., Astigmatism impact on visual performance: meridional and adaptational effects, Optometry and Vision Science 90(12), 2013, pp. 1430–1442.
  • [24] DE GRACIA P., DORRONSORO C., MARIN G., HERNÁNDEZ M., MARCOS S., Visual acuity under combined astigmatism and coma: optical and neural adaptation effects, Journal of Vision 11(2), 2011, article 5, pp. 1–11.
  • [25] POULERE E., MOSCHANDREAS J., KONTADAKIS G.A., PALLIKARIS I.G., PLAINIS S.T., Effect of blur and subsequent adaptation on visual acuity using letter and Landolt C charts: differences between emmetropes and myopes, Ophthalmic and Physiological Optics 33(2), 2013, pp. 130–137.
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