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Vision Science and Its Applications

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Vision Science and Its Applications POSTCONFERENCE EDITION Summaries of the papers presented at the topical meeting Vision Science and VISION SCIENCE its Applications AND ITS APPLICATIONS February 3-7, 1995 Santa Fe, New Mexico 1995 Technical Digest Series Volume 1 Sponsored by Optical Society of America In cooperation with The American Academy of Optometry FRIDAY FEBRUARY 3, 1995 ANASAZ1 SOUTH 1 0:40am FB2 • Computer simulation model for imaging by PALs and its 8:00am-8:05am validation, Peter Baumbach, Optische Werke G. Rodenstock, Ger¬ Remarks Opening many. Imaging performance of progressive power lenses is calcu¬ Charles Campbell, Humphrey Instruments, Inc., General Chair lated by use of a computer simulation method. The results are 8:00am-9:45am compared with subjective visual acuity measurements, (p. 24) FA, Optical Correction: 1 Discussant: Gilles LeSaux, Essilor, France G. Guilino, Optische Werke G. Rodenstock, Germany, Presider 11:05am 8:05am FB3 • Aspherization does not make single vision lenses significantly FA1 • Measurement of progressive addition lenses, Colin W. Fowler, thinner, Fanny Jurkiewiez, Francoise Ahsbahs, Gilles LeSaux, Essilor Aston Univ., Birmingham, UK. Methods for the measurement of pro¬ International, France. Single-vision lens thickness depends on in¬ in to their usefulness gressive addition lenses are discussed relation dex, base curve, aspherization. Aspherization effects are shown to and to the role of standards, for different requirements (p. 2) give no real contribution to thickness. Aspherization goal is acuity, Discussant: Guenther H. Guilino, Optische Werke G. (p. 28) Rodenstock, Germany Discussant: Colin Fowler, Aston University, UK 8:30am 11:30am FA2 • New method for characterizing progressive addition lenses, FB4 • Central and lateral static distortion in ophthalmic lenses, Charles E. Campbell, Humphrey Instruments Inc. The power gradi¬ Pierre Simonet, Univ. Montreal, Canada; Bernard Bourdoncle, Chris¬ ent of the lens is measured in a small area using an automatic tian Miege, Essilor International, France. The magnitude of central lensmeter. This measurement, designated PV, is repeated on selected, static and lateral static distortion at the periphery of ophthalmic the lens separated areas of the lens to create a profile of gradient lenses is determined by ray tracing for various designs of lenses, change on lenses of different designs, (p. 6) (p. 31) Discussant: Colin W. Fowler, Aston University, UK Discussant: David A. Atchison, Queensland University of Australia 8:55am Technology, FA3 • Interferometric assessment of the surface profile of diffractive 11:55am-1:30pm bifocal contact lenses, Russell L. Woods, Queensland Univ. Tech¬ Lunch nology, Australia. A technique using a Nomarski interferometer and ANASAZI SOUTH a reflectance microscope for measurement of the surface profile of and soft diffractive bifocal contact lenses is described, 10) rigid (p. 1:30pm-3:1 5pm Discussant: Michael Simpson, Alcon Laboratories FC, Cornea R. A. Applegate, University of Texas Health Sciences Center, 9:20am Presider FA4 • Hyperchromatic lenses as potential aids for the presbyope, W. N. Charman, H. D. Whitefoot, UMIST, UK. Experiments show 1:30pm (INVITED) that a correcting lens that enhances the natural longitudinal chro¬ FC1 • Refractive surgery—success and the public health, Leo matic aberration of the eye may increase the ocular depth-of-focus Maguire, Mayo Clinic. Abstract not available, (p. 36) and hence assist presbyopes. (p. 14) 2:00pm Discussant: of Canada Jacob Sivak, University Waterloo, FC2 • Representing corneal shape, S. A. Klein, R. B. Mandell, B. A. Several new methods for 9:45am-1 0:1 5am Barsky, UC-Berkeley. representing gen¬ Coffee Break eral (not axially symmetric) corneal shapes are compared. The de¬ pendence on choice of axis is made explicit, (p. 37) ANASAZI SOUTH Discussant: John E. Greivenkamp, University ofArizona 10:15am-11:55am 2:25pm Correction: 2 FB, Optical • FC3 Zernike polynomial representations of videokeratoscope W. N. Charman, of Manchester, UK, Presider University height data, Jim Schwiegerling, John E. Greivenkamp, Joseph M. 10:15am Miller, Univ. Arizona. Corneal height data is analyzed by Zernike FB1 • Simplified strategies for the simulation of progressive addi¬ polynomial expansion. Removing low-order terms shows residual tion lenses, Colin W. Fowler, Aston Univ., Birmingham, UK. Three height variations. Applications include clinical feature identifica¬ approaches are described for the simulation of the optical perfor¬ tion and optical modeling, (p. 41) mance of progressive addition spectacle lenses, to be used for teach¬ Discussant: Robert Webb, Massachusetts General Hospital ing purposes, (p. 20) Discussant: P. Baumbach, Optische Werke G. Rodenstock, Germany V FRIDAY FEBRUARY 3, 1995 2:50pm 4:40pm FC4 • High and low contrast acuity followingexcimerpho¬ FD3 • Quasielastic light scattering from the aging human lens in torefractive keratectomy, E. J. Casson, W.B. Jackson, G. vivo, George M. Thurston, Douglas L. Hayden, Victor G. Taret, Joel Mintsioulis, Univ. Ottawa, Canada. Comparisons of pre- Kandel, Joyce A. Peetermans, Mark S. Bowen, Oculon Corp; Pendra and post-PRK values reveal a decrease in low-contrast rela¬ Burrows, John I. Clark, Maria Courogen, Univ. Washington; David tive to high-contrast acuity and an increase in variability in Miller, Harvard Medical School; Keith M. Sullivan, Rainer Storb, visual outcome, (p. 45) Univ. Washington School of Medicine; Hal Stern, Harvard Univ.; B. Benedek, Massachusetts Institute of In vivo Discussant: Mark Bullimore, University of California, George Technology. is used to measures Berkeley quasielastic light scattering provide quantitative of the increase in protein association in human lens cell cytoplasm 3:15pm—3:45pm with age. (p. 57) Coffee Break Discussant: Melanie C. Campbell, University of Waterloo, ANASAZI SOUTH Canada 3:45pm-5:30pm 5:05pm FD, Acuity and Visual Performance FD4 • Fiber optic reading magnifiers for the visually impaired, Eli Vasudevan Lakshminarayanan, University of Missouri, St. Peli, Schepens Eye Research Institute; Walter P. Siegmund, Taper Louis, Presider Vision, Inc. Fiber optics reading magnifiers specifically designed for low vision are better economically than existing devices. Low reso¬ (INVITED) 3:45pm lution enables higher contrast and lower cost. (p. 61) FD1 • Vision science in the developing world: challenges, Discussant: Vasudevan of Missouri, opportunities, problems, and example, Jay M. Enoch, UC- Lakshminarayanan, University St. Louis Berkeley. In the developing world, population growth and aging, and limited resources, create major problems. Vi¬ 7:30pm sion scientists can play meaningful roles. Research in such Forum on Ophthalmic Lenses, Especially Progressive settings, with an example given, is discussed, (p. 50) Addition Lenses (PALs) G. Guilino, Optische Werke G. Rodenstock, Germany, Presider 4:1 5pm and FD2 • Aging and the eye's optical performance, Junzhong Organizer Liang, Gerald Westheimer, UC-Berkeley. Objective mea¬ This forum will discuss the topics on experience with progressive surements of and data from tests in light spread stray light addition lenses in cases of anisometropia, and cylindrical correc¬ the same observers were used to construct point-spread tion. Functional monocularity and alternating fixation will also be and older functions of young eyes. (p. 54) covered. The forum is open to all attendees. Discussant: Rafael Navarro, Instituto de Optica, Spain vi SATURDAY FEBRUARY 4, 1995 ANASAZI SOUTH 1 0:35am SaB2 • Magnetic resonance images of the ciliary muscle and lens 8:00am-9:40am in presbyopesandnonpresbyopes, Susan Strenk, John L. Semmlow, of the Eye SaA, Optical Quality Rutgers Univ. High resolution magnetic images of the eye, using a Howard C. Howl and, Cornell Presider University, specially designed radio frequency receiver coil in conjunction with software direct evidence of in the 8:00am modifications, provide changes and lens accommodation. In the SaA1 • On the true shape of the optical point spread function in ciliary body during presbyopes, muscle continues to contract even the lens is no the human eye, Rafael Navarro, M. Angeles Losada, Instituto de ciliary though longer Optica, Spain. The ocular point spread function, including the ef¬ capable of shape changes, (p. 88) fect of both even and odd aberrations, can be obtained by two asym¬ Discussant: Jane F. Koretz, Rensselaer Polytechnic Institute media, metric passages of the light through the ocular (p. 66) 11:00am Discussant: W. Neil of Manchester, UK Charman, University • SaB3 Binocular pupil brightness changes in the presence of stra¬ 8:25am bismus: predictions from computer modeling, Heidi Leising Hall, SaA2 • Effect of higher order aberrations on image quality in the Joseph M. Miller, John E.Greivenhamp, Univ. Arizona. The simulta¬ neous of the with coaxial illumination in the human eye, Junzhong Liang, David R. Williams, Univ. Rochester. brightness pupils pres¬ ence of ocular is modeled with various amounts of We present new measurements of the eye's wave aberrations that misalignment reveal substantial image degradation from aberrations at a fine spa¬ background CCD camera noise, (p. 92) tial scale in the pupil, (p. 70) Discussant: Tom Cornsweet, University of California, Irvine Discussant: Valdemar Portney, Allergan Medical Optics 11:25am-1:30pm 8:50am Lunch • Line function and measurements of SaA3 spread glare disability ANASAZI SOUTH cataractous eyes, Peter Magnante, Brookfield Optical Systems; Carmel Noonan,
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