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Abstract:

Ocular aberrations depend on pupil size and centring and the retinal image quality under natural conditions differs from that corresponding to laboratory ones. In the present article, pupil and wave aberration data supplied by the Shin Nippon CT 1000 (SN CT 1000) topography system are analysed. Two groups of eyes under natural viewing conditions are considered ((260±20) lux at the eye under study). The first group consists of 10 normal eyes (-1.25 to 3 D sphere; 0 to -1.75 D cylinder) of five young subjects (age between 18 and 33 years). For this group, five determinations per eye are performed and the repeatability of results is analysed. Pupil centre is displaced from corneal vertex towards the temporal region, the largest displacement being (0.5±0.1) mm. The variation of pupil diameter in each eye is less than 21% while the inter-subject variability is large since diameters are between (3±0.3) and (5.3±0.6) mm. Aberrations are evaluated for two different pupil sizes, the natural one and a fictitious one of 6 mm. The corneal higher-order root-mean square wavefront error (RMSHO) for a 6 mm pupil centred in the corneal vertex, averaged across all eyes, is (0.37±0.06) μm while, considering the natural pupil diameter, the average in each eye is significantly lower, up to eight times smaller. The fourth-order spherical aberration is an important aberration in the considered eyes, its maximum value for a 6 mm pupil being (0.38±0.02) μm. The second group consists of 24 eyes of 12 subjects (age between 25 and 68 years) such that four eyes are of normal adults (1.25 to +6 D sphere; 0 to -0.5 D cylinder), eight have astigmatisms (-5.5 to +3.25 D sphere; -1.5 to -4.5 D cylinder), six have post-refractive surgery (+0.5 to +3.5 D sphere; -0.5 to -4 D cylinder) and six have keratoconus (-9.5 to +1 D sphere; -1 to -4.5 D cylinder). For this group only one determination per eye is performed. Pupil centre is displaced from corneal vertex towards the temporal region except in cases of keratoconus, where there can be a dominant upwards displacement. Pupil diameters are between 2.7 and 5.6 mm. The corneal higher order root mean square wavefront error for a 6 mm pupil ranges between 0.3 (normal eye) and 5.3 μm (keratoconus). © 2006 Elsevier GmbH. All rights reserved.

Registro:

Documento: Artículo
Título:Analysis of pupil and corneal wave aberration data supplied by the SN CT 1000 topography system
Autor:Comastri, S.A.; Martin, G.; Pfortner, T.
Filiación:Laboratorio de Optica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Consejo de Investigaciones Científicas y Técnicas, C1033AAJ Buenos Aires, Argentina
QLOGIC S.A., Argentina and Instituto de Astronomía y Física del Espacio, (C1117ABE), Buenos Aires, 1428, Argentina
Laboratorio Pfortner-Cornealent S.A., C1119ACN Buenos Aires, Argentina
Palabras clave:Corneal aberrations; Ocular pupil; Data reduction; Ophthalmology; Research laboratories; Wavefronts; Corneal aberrations; Ocular pupil; Aberrations
Año:2006
Volumen:117
Número:11
Página de inicio:537
Página de fin:545
DOI: http://dx.doi.org/10.1016/j.ijleo.2005.11.018
Título revista:Optik
Título revista abreviado:Optik
ISSN:00304026
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00304026_v117_n11_p537_Comastri

Referencias:

  • Kaufman, P., Alm, y.A., (2004) Adler fisiología del ojo, , Elsevier, Madrid
  • Michaels, D.D., (1980) Visual Optics and Refraction, A Clinical Approach, , C. V. Mosby, St. Louis
  • Goodman, J.W., (1996) Introduction to Fourier Optics, , Mc Graw-Hill, New York
  • Born, M., Wolf, B., (1987) Principles of Optics, , Pergamon, Oxford
  • Hopkins, H.H., Image formation by a general optical system. 1. General theory (1985) Appl. Opt., 24, pp. 2491-2505
  • Comastri, S.A., Simon, J.M., Ray tracing, aberration function and spatial frequencies (1984) Optik, 66, pp. 175-190
  • Simon, J.M., Comastri, S.A., Image forming systems: matrix formulation of the optical invariant via Fourier optics (1996) J. Mod. Opt., 43, pp. 2533-2541
  • Comastri, S.A., Simon, J.M., Blendowske, R., Generalized sine condition for image-forming systems with centering errors (1999) J. Opt. Soc. Am. A, 16, pp. 602-611
  • Liang, J., Williams, D.R., Miller, D.T., Supernormal vision and high-resolution retinal imaging through adaptive optics (1997) J. Opt. Soc. Am. A, 14, pp. 2884-2892
  • Liang, J., Williams, D.R., Aberrations and retinal image quality of the normal human eye (1997) J. Opt. Soc. Am. A, 14, pp. 2873-2883
  • Artal, P., Guirao, A., Contribution of the cornea and the lens to the aberrations of the human eye (1998) Opt. Lett., 23, pp. 1713-1715
  • Guirao, A., Gonzalez, C., Redondo, M., Geragbty, E., Norrby, S., Artal, P., Average optical performance of the human eye as a function of age in a normal population (1999) Inv. Opt. Vis. Sci., 40, pp. 203-213
  • Guirao, A., Williams, D.R., Cox, I.G., Effect of rotation and translation on the expected benefit of an ideal method to correct the eye's higher order aberrations (2001) J. Opt. Soc. Am. A, 18, pp. 1003-1015
  • Applegate, R., Thibos, L., Bradley, A., Marcos, S., Roorda, A., Salmon, T., Atchison, D., Reference axis selection: subcommittee report of the OSA working group to establish standards for measurement and reporting of optical aberrations of the eye (2000) J. Refract. Surg., 16, pp. 656-658
  • Thibos, L., Applegate, R., Schwiegerling, J., Webb, R., VST Members, Standards for reporting the optical aberrations of eyes (2000) Vis. Sci. Appl. Tops Volume, p. 35
  • Guirao, A., Artal, P., Corneal wave aberration from videokeratography: accuracy and limitations of the procedure (2000) J. Opt. Soc. Am. A, 17, pp. 955-965
  • Applegate, R., Hilmantel, G., Howland, H., Tu, E., Starck, T., Zayac, J., Corneal first surface optical aberrations and visual performance (2000) J. Refract. Surg., 16, pp. 507-514
  • Applegate, R., Howland, H., Klyce, S., (2001) Corneal aberrations and refractive surgery. Customized Corneal Ablation: The Quest for Supervision, , Slack Incorporated, USA
  • Barbero, S., Marcos, S., Merayo-Lloves, J., Moreno Barriuso, E., Validation of the Estimation of Corneal Aberrations From Videokeratography in Keratoconus (2002) J. Refract. Surg., 18, pp. 263-269
  • Marcos, S., Aberrations and visual performance following standard laser vision correction (2001) J. Refract. Surg., 17, pp. 596-601
  • Marcos, S., Barbero, S., Llorente, L., Merayo-Lloves, J., Optical response to myopic LASIK surgery from total and corneal aberration measurements (2001) Inv. Ophthalmol. Vis. Sci., 42, pp. 3349-3356
  • Moreno Barriuso, E., Marcos, S., Navarro, R., Burns, S., Comparing laser ray tracing (2001) the spatially resolved refractometer and the Hartmann-Shack sensor to measure the ocular wave aberration, Optom. Vis. Sci., 78, pp. 152-156
  • Salmon, T.O., West, R.W., Gasser, W., Kenmore, T., Measurement of refractive errors in young miopes using the COAS Shack-Hartmann aberrometer (2003) Optom. Vis. Sci., 80, pp. 6-14
  • Guo, H., Wang, Z., Zhao, Q., Quan, W., Wang, Y., Individual eye model based on wavefront aberration (2005) Optik, 116, pp. 80-85
  • Hofer, H., Chen, L., Yoon, G.Y., Singer, B., Yamauchi, Y., Williams, D., Improvement in retinal image quality with dynamic correction of the eye's aberrations (2001) Opt. Express, 8, pp. 631-643

Citas:

---------- APA ----------
Comastri, S.A., Martin, G. & Pfortner, T. (2006) . Analysis of pupil and corneal wave aberration data supplied by the SN CT 1000 topography system. Optik, 117(11), 537-545.
http://dx.doi.org/10.1016/j.ijleo.2005.11.018
---------- CHICAGO ----------
Comastri, S.A., Martin, G., Pfortner, T. "Analysis of pupil and corneal wave aberration data supplied by the SN CT 1000 topography system" . Optik 117, no. 11 (2006) : 537-545.
http://dx.doi.org/10.1016/j.ijleo.2005.11.018
---------- MLA ----------
Comastri, S.A., Martin, G., Pfortner, T. "Analysis of pupil and corneal wave aberration data supplied by the SN CT 1000 topography system" . Optik, vol. 117, no. 11, 2006, pp. 537-545.
http://dx.doi.org/10.1016/j.ijleo.2005.11.018
---------- VANCOUVER ----------
Comastri, S.A., Martin, G., Pfortner, T. Analysis of pupil and corneal wave aberration data supplied by the SN CT 1000 topography system. Optik. 2006;117(11):537-545.
http://dx.doi.org/10.1016/j.ijleo.2005.11.018