By Dr Klaus Ehrmann

Book Chapters

Ehrmann K, 2018, 'Rigid Lens Measurement', in Contact Lens Practice, pp. 136 - 142.e1, http://dx.doi.org/10.1016/B978-0-7020-6660-3.00014-9

Ehrmann K, 2018, 'Soft Lens Measurement', in Contact Lens Practice, pp. 73 - 85.e2, http://dx.doi.org/10.1016/B978-0-7020-6660-3.00007-1

Journal articles

Ehrmann K, 2023, 'Vor- und Nachteile von Power Mapping bei weichen Kontaktlinsen', Optometry & Contact Lenses, 4, pp. 28 - 34, http://dx.doi.org/10.54352/dozv.ypnz6080

Spychala B; Ehrmann K, 2023, 'Chromatic dispersion of soft contact lens materials', Contact Lens and Anterior Eye, 46, http://dx.doi.org/10.1016/j.clae.2023.101864

Tilia D; Diec J; Ehrmann K; Falk D; Fedtke C; Conrad F; Wu R; Bakaraju RC, 2023, 'Visual Performance and Binocular/Accommodative Function of S.T.O.P. Contact Lenses Compared with MiSight', Eye and Contact Lens, 49, pp. 63 - 70, http://dx.doi.org/10.1097/ICL.0000000000000950

Maceo Heilman B; Durkee H; Rowaan CJ; Arrieta E; Kelly SP; Ehrmann K; Manns F; Parel JM, 2022, 'Temperature affects the biomechanical response of in vitro non-human primate lenses during lens stretching', Experimental Eye Research, 216, http://dx.doi.org/10.1016/j.exer.2022.108951

Kim E; Ehrmann K, 2020, 'Refractive index of soft contact lens materials measured in packaging solution and standard phosphate buffered saline and the effect on back vertex power calculation', Contact Lens and Anterior Eye, 43, pp. 123 - 129, http://dx.doi.org/10.1016/j.clae.2019.12.005

Koumbo Mekountchou IO; Conrad F; Sankaridurg P; Ehrmann K, 2020, 'Peripheral eye length measurement techniques: a review', Clinical and Experimental Optometry, 103, pp. 138 - 147, http://dx.doi.org/10.1111/cxo.12892

Fedtke C; Ehrmann K; Bakaraju RC, 2020, 'Peripheral refraction and spherical aberration profiles with single vision, bifocal and multifocal soft contact lenses', Journal of Optometry, 13, pp. 15 - 28, http://dx.doi.org/10.1016/j.optom.2018.11.002

Sankaridurg P; Bakaraju RC; Naduvilath T; Chen X; Weng R; Tilia D; Xu P; Li W; Conrad F; Smith EL; Ehrmann K, 2019, 'Myopia control with novel central and peripheral plus contact lenses and extended depth of focus contact lenses: 2 year results from a randomised clinical trial', Ophthalmic and Physiological Optics, 39, pp. 294 - 307, http://dx.doi.org/10.1111/opo.12621

Kim E; Saha M; Ehrmann K, 2018, 'Mechanical Properties of Contact Lens Materials', Eye & contact lens, 44, pp. S148 - S156, http://dx.doi.org/10.1097/ICL.0000000000000442

Ehrmann K; Saha M; Falk D, 2018, 'A novel method to stimulate mechanoreceptors and quantify their threshold values', Biomedical Physics and Engineering Express, 4, http://dx.doi.org/10.1088/2057-1976/aa9b8d

Bakaraju RC; Ehrmann K; Ho A, 2018, 'Extended depth of focus contact lenses vs. two commercial multifocals: Part 1. Optical performance evaluation via computed through-focus retinal image quality metrics', Journal of Optometry, 11, pp. 10 - 20, http://dx.doi.org/10.1016/j.optom.2017.04.003

Tilia D; Bakaraju R; Chung J; Sha J; Delaney S; Munro A; Thomas V; Ehrmann K; Holden B, 2018, 'Evaluation of novel-design extended depth of focus multifocal contact lenses', Contact Lens and Anterior Eye, 41, pp. S22 - S22, http://dx.doi.org/10.1016/j.clae.2018.04.150

Munro A; Bakaraju R; Chung J; Sha J; Tilia D; Delaney S; Ehrmann K; Thomas V; Holden B, 2018, 'Evaluation of the potential of novel extended depth-of-focus contact lenses compared with AirOptix AQUA multifocal contact lenses', Contact Lens and Anterior Eye, 41, pp. S23 - S24, http://dx.doi.org/10.1016/j.clae.2018.04.154

Delaney S; Bakaraju R; Tilia D; Chung J; Sha J; Munro A; Ehrmann K; Naduvilath T; Holden B, 2018, 'Factors determining success with presbyopic contact lenses', Contact Lens and Anterior Eye, 41, pp. S24 - S24, http://dx.doi.org/10.1016/j.clae.2018.04.155

Sha J; Bakaraju RC; Chung J; Tilia D; Delaney S; Munro A; Ehrmann K; Thomas V; Holden BA, 2018, 'Visual performance with commercial soft multifocal contact lenses', Contact Lens and Anterior Eye, 41, pp. S22 - S23, http://dx.doi.org/10.1016/j.clae.2018.04.151

Fedtke C; Ehrmann K; Thomas V; Bakaraju RC, 2017, 'Peripheral Refraction and Aberration Profiles with Multifocal Lenses', Optometry and Vision Science, 94, pp. 876 - 885, http://dx.doi.org/10.1097/OPX.0000000000001112

Fedtke C; Sha J; Thomas V; Ehrmann K; Bakaraju RC, 2017, 'Impact of Spherical Aberration Terms on Multifocal Contact Lens Performance', Optometry and Vision Science, 94, pp. 197 - 207, http://dx.doi.org/10.1097/OPX.0000000000001017

Kim E; Bakaraju RC; Ehrmann K, 2017, 'Power Profiles of Commercial Multifocal Soft Contact Lenses', Optometry and Vision Science, 94, pp. 183 - 196, http://dx.doi.org/10.1097/OPX.0000000000000998

Tilia D; Munro A; Chung J; Sha J; Delaney S; Kho D; Thomas V; Ehrmann K; Bakaraju RC, 2017, 'Short-term comparison between extended depth-of-focus prototype contact lenses and a commercially-available center-near multifocal', Journal of Optometry, 10, pp. 14 - 25, http://dx.doi.org/10.1016/j.optom.2016.04.003

Fedtke C; Ehrmann K; Thomas V; Bakaraju RC, 2016, 'Association between multifocal soft contact lens decentration and visual performance', Clinical Optometry, 8, pp. 57 - 69, http://dx.doi.org/10.2147/OPTO.S108528

Tilia D; Bakaraju RC; Chung J; Sha J; Delaney S; Munro A; Thomas V; Ehrmann K; Holden BA, 2016, 'Erratum: Short-Term Visual Performance of Novel Extended Depth-of-Focus Contact Lenses (Optometry and Vision Science (2016) 93 (435-444))', Optometry and Vision Science, 93, pp. 656, http://dx.doi.org/10.1097/OPX.0000000000000897

Fedtke C; Eehrmann K; Thomas V; Bakaraju RC; Ehrmann K, 2016, 'Visual performance with multifocal soft contact lenses in non-presbyopic myopic eyes during an adaptation period', Clinical Optometry, 8, pp. 37 - 46, http://dx.doi.org/10.2147/OPTO.S96712

Kim E; Bakaraju RC; Ehrmann K, 2016, 'Reliability of power profiles measured on NIMO TR1504 (Lambda-X) and effects of lens decentration for single vision, bifocal and multifocal contact lenses', Journal of Optometry, 9, pp. 126 - 136, http://dx.doi.org/10.1016/j.optom.2015.10.005

Spierer O; Felix ER; McClellan AL; Parel JM; Gonzalez A; Feuer WJ; Sarantopoulos CD; Levitt RC; Ehrmann K; Galor A, 2016, 'Corneal mechanical thresholds negatively associate with dry eye and ocular pain symptoms', Investigative Ophthalmology and Visual Science, 57, pp. 617 - 625, http://dx.doi.org/10.1167/iovs.15-18133

Fedtke C; Bakaraju RC; Ehrmann K; Chung J; Thomas V; Holden BA, 2016, 'Visual performance of single vision and multifocal contact lenses in non-presbyopic myopic eyes', Contact Lens and Anterior Eye, 39, pp. 38 - 46, http://dx.doi.org/10.1016/j.clae.2015.07.005

Bakaraju RC; Fedtke C; Ehrmann K; Falk D; Thomas V; Holden BA, 2016, 'Peripheral refraction and higher-order aberrations with cycloplegia and fogging lenses using the BHVI-EyeMapper', Journal of Optometry, 9, pp. 5 - 12, http://dx.doi.org/10.1016/j.optom.2015.06.003

Tilia D; Bakaraju RC; Chung J; Sha J; Delaney S; Munro A; Thomas V; Ehrmann K; Holden BA, 2016, 'Short-term visual performance of novel extended depth-of-focus contact lenses', Optometry and Vision Science, 93, pp. 435 - 444, http://dx.doi.org/10.1097/OPX.0000000000000806

Bakaraju RC; Fedtke C; Ehrmann K; Ho A, 2015, 'Comparing the relative peripheral refraction effect of single vision and multifocal contact lenses measured using an autorefractor and an aberrometer: A pilot study', Journal of Optometry, 8, pp. 206 - 218, http://dx.doi.org/10.1016/j.optom.2015.01.005

Bakaraju RC; Fedtke C; Ehrmann K; Falk D; Thomas V; Holden BA, 2015, 'Peripheral refraction and higher-order aberrations with cycloplegia and fogging lenses using the BHVI-EyeMapper', Journal of Optometry, http://dx.doi.org/10.1016/j.optom.2015.06.003

Wagner S; Conrad F; Bakaraju RC; Fedtke C; Ehrmann K; Holden BA, 2015, 'Power profiles of single vision and multifocal soft contact lenses', Contact Lens and Anterior Eye, 38, pp. 2 - 14, http://dx.doi.org/10.1016/j.clae.2014.07.008

Sha J; Bakaraju RC; Tilia D; Chung J; Delaney S; Munro A; Ehrmann K; Thomas V; Holden BA, 2015, 'Short-term visual performance of soft multifocal contact lenses for presbyopia', Arquivos Brasileiros de Oftalmologia, 79, pp. 73 - 77, http://dx.doi.org/10.5935/0004-2749.20160023

Nankivil D; Heilman BM; Durkee H; Manns F; Ehrmann K; Kelly S; Arrieta-Quintero E; Parel JM, 2015, 'The zonules selectively alter the shape of the lens during accommodation based on the location of their anchorage points', Investigative Ophthalmology and Visual Science, 56, pp. 1751 - 1760, http://dx.doi.org/10.1167/iovs.14-16082

Fedtke C; Bakaraju RC; Ehrmann K; Chung J; Thomas V; Holden BA, 2014, 'Visual performance of single vision and multifocal contact lenses in non-presbyopic myopic eyes', Contact Lens and Anterior Eye, http://dx.doi.org/10.1016/j.clae.2015.07.005

Fedtke C; Ehrmann K; Falk D; Bakaraju RC; Holden BA, 2014, 'The BHVI-eyemapper: Peripheral refraction and aberration profiles', Optometry and Vision Science, 91, pp. 1199 - 1207, http://dx.doi.org/10.1097/OPX.0000000000000364

De La Jara PL; Sankaridurg P; Ehrmann K; Holden BA, 2014, 'Influence of contact lens power profile on peripheral refractive error', Optometry and Vision Science, 91, pp. 642 - 649, http://dx.doi.org/10.1097/OPX.0000000000000273

Rohit A; Ehrmann K; Naduvilath T; Willcox M; Stapleton F, 2014, 'Validating a new device for measuring tear evaporation rates', Ophthalmic and Physiological Optics, 34, pp. 53 - 62, http://dx.doi.org/10.1111/opo.12096

Ozkan J; Bakaraju R; Fedtke C; Chung J; Ehrmann K; Falk D; Ho A; Holden B, 2013, 'Short-term adaptation of accommodative lag, facility and phoria in myopes fitted with multifocal contact lenses',

Wagner S; Conrad F; Bakaraju RC; Fedtke C; Ehrmann K, 2013, 'Power profiles of single vision soft contact lenses', Contact Lens and Anterior Eye, 36, pp. e33 - e33, http://dx.doi.org/10.1016/j.clae.2013.08.115

Kim E; Ehrmann K, 2012, 'Assessment of accuracy and repeatability of anterior segment optical coherence tomography and reproducibility of measurements using a customised software program', Clinical and Experimental Optometry, 95, pp. 432 - 441, http://dx.doi.org/10.1111/j.1444-0938.2012.00724.x

Takatori S; Lazon P; Holden BA; Ehrmann K; Ho A; Radke C, 2012, 'Author Response: In Vivo Oxygen Uptake into the Human Cornea', Investigative Ophthalmology and Visual Science, 53, pp. 6829, http://dx.doi.org/10.1167/iovs.12-10901

Takatori S; Lazon P; Holden BA; Ehrmann K; Ho A; Radke C, 2012, 'In vivo oxygen uptake into the human cornea', Investigative Ophthalmology and Visual Science, 53, pp. 6331 - 6337, http://dx.doi.org/10.1167/iovs.12-10059

Bakaraju RC; Ehrmann K; Falk D; Ho A; Papas EB, 2012, 'Optical performance of multifocal soft contact lenses via a single-pass method', Optometry and Vision Science, 89, pp. 1107 - 1118, http://dx.doi.org/10.1097/OPX.0b013e318264f3e9

Ozkan J; de la Jara PL; Ehrmann K; Lally J; Willcox MD, 2011, '22 Effect of edge shape and lens geometrychanges on conjunctival staining during daily wear', Contact Lens and Anterior Eye, 34, pp. S21 - S21, http://dx.doi.org/10.1016/s1367-0484(11)60101-x

Kim E; Ehrmann K; Uhlhorn S; Borja D; Arrieta-Quintero E; Parela J, 2011, 'Semiautomated analysis of optical coherence tomography crystalline lens images under simulated accommodation', Journal of Biomedical Optics, 16, pp. Article number: 056003, http://dx.doi.org/10.1117/1.3574613

Conrad F; Ehrmann K; Choo JD; Holden BA, 2010, 'Finite Element Modeling of Inverted (Inside Out) Soft Contact Lenses', Journal of Medical Devices, 4, pp. 024501-1 - 024501-6, http://dx.doi.org/10.1115/1.4001519

Bakaraju RC; Ehrmann K; Ho A; Papas EB, 2010, 'Inherent ocular spherical aberration and multifocal contact lens optical performance', Optometry and Vision Science, 87, pp. 1009 - 1022, http://dx.doi.org/10.1097/OPX.0b013e3181fbad60

Bakaraju RC; Ehrmann K; Falk D; Ho A; Papas EB, 2010, 'Physical human model eye and methods of its use to analyse optical performance of soft contact lenses', Optics Express, 18, pp. 16868 - 16882, http://dx.doi.org/10.1364/OE.18.016868

Papas EB; Dahms A; Carnt N; Tahhan N; Ehrmann K, 2009, 'Power profiles and short-term visual performance of soft contact lenses', Optometry and Vision Science, 86, pp. 318 - 323, http://dx.doi.org/10.1097/OPX.0b013e318198959e

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