MP Logos. Mountain Pointe Letter Logo. MPHS Logo jpg jpg format. MPHS Logo png png format (transparent background). *** For a vector PDF print format, or a ...

Carones F, Vigo L, Scandola E (2003) Wavefront-guided treatment of abnormal eyes using the LADARVision platform. J Refract Surg 19:S703–S708

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Koller T, Iseli HP, Hafezi F, Mrochen M, Seiler T (2006) Q-factor customized ablation profile for the correction of myopic astigmatism. J Cataract Refract Surg 32:584–589

Roberts C (1994) Characterization of the inherent error in a spherically-biased corneal topography system in mapping a radially aspheric surface. J Refract Corneal Surg 10:103–116

Doane JF, Cavanaugh TB, Durrie DS et al (1995) Relation of visual symptoms to topographic ablation zone decentration after excimer laser photorefractive keratectomy. Ophthalmology 102:42–47

Alió JL, Belda JI, Osman AA, Shalaby AMM (2003) Topography-guided laser in situ keratomileusis (TOPOLINK) to correct irregular astigmatism after previous refractive surgery. J Refract Surg 19: 516–527

Mrochen M, Krueger RR, Bueeler M et al (2002) Aberration sensing and wavefront-guided laser in situ keratomileusis: management of decentered ablation. J Refract Surg 18:418–429

Improvement of production technology has brought a democratization of the use of complex aspherical lenses. What are their benefits, how to manufacture them, see our guide below for answers.

Hori-Komai Y, Toda I, Asano-Kato N, Ito M, Yamamoto T, Tsubota K (2006) Comparison of LASIK using the NIDEK EC-5000 optimized aspheric transition zone (OATz) and conventional ablation profile. J Refract Surg 22:546–555

Mastropasqua L, Toto L, Zuppardi E, Nubile M, Carpineto P, Di Nicola M, Ballone E (2006) Photorefractive keratectomy with aspheric profile of ablation versus convencional photorefractive keratectomy for myopia correction: six-month controlled clinical trial. J Cataract Refract Surg 32:109–116

Mrochen M, Donitzky C, Wullner C, Loffler J (2004) Wavefront-optimized ablation profiles: theoretical background. J Cataract Refract Surg 30:775–785

Alessio G, Boscia F, La Tegola MG, Sborgia C (2000) Topography-driven photorefractive keratectomy: results of corneal interactive programmed topographic ablations software. Ophthalmology 107:1578–1587

For a simple image comparison, a spherical lens can be seen as a cut of a sphere whereas an aspherical lens can be defined by more complex shapes, for example conic or elliptic.

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Lin DY, Manche EE (2004) Custom contoured ablation pattern method for the treatment of decentered laser ablations. J Cataract Refract Surg 30:1675–1684

Aberration in Optics pdf

Z stands for the surface (SAG) of the lens R is the Radius of curvature K: Conic constant Ax: Aspheric coefficient of xth order (can be null)

Carones F, Vigo L, Scandola E (2006) Wavefront-guided treatment of symptomatic eyes using the LADAR6000 excimer laser. J Refract Surg 22:S983–S989

Spherical aberration

Alió J.L, Javaloy J, Merayo J, Galal A (2004) Automated superficial lamellar keratectomy augmented by excimer laser masked PTK in the management of severe superficial corneal opacities. Br J Ophthalmol 88:1289–1294

Hersh PS, Fry K, Blaker JW (2003) Spherical aberration after laser in situ keratomileusis and photorefractive keratectomy. Clinical results and theoretical models of etiology. J Cataract Refract Surg 29:2096–2104

Chalita MR, Chavala S, Xu, Krueger RR (2004) Wavefront Analysis in post LASIK eyes and its correlation with visual symptoms, refraction and topography. Ophthalmology 111:447–453

Kermani O, Schmiedt K, Oberheide U, Gerten G (2003) Early results of Nidek customized aspheric transition zones (CATz) in laser in situ keratomileusis. J Refract Surg 19(2 Suppl):S190–S194

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Roberts C (1995) Analysis of the inherent error of the TMS-1 topographic modeling system in mapping a radially aspheric surface. Cornea 14:258–265

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Lafond G, Bonnet S, Solomon L (2004) Treatment of previous decentered excimer laser ablation with combined myopic and hyperopic ablations. J Refract Surg 20:139–148

Pallikaris IG, Katsanevaki VJ, Ginis HS (2004) The PALM technique for the treatment of corneal irregular astigmatism. In: Alio JL, Belda JI (eds). Treating irregular astigmatism and keratoconus. Highlights of Ophthalmology International, El Dorado, Republic of Panama, pp 97–101

Marcos S, Cano D, Barbero S (2003) Increase in corneal asphericity after standard laser in situ keratomileusis for myopia is not inherent to the Munnerlyn algorithm. J Refract Surg 19:S592–S596

Pallikaris IG, Siganos DS, Katsanevaki VJ (1998) LASIK complications and their management. In: Pallikaris IG, Siganos DS (eds) LASIK. Slack, Thorofare, N.J., pp 257–274

Jorge L. Alió M.D., Ph.D. (Professor and Chairman of Ophthalmology, Medical Director) (Professor and Chairman of Ophthalmology, Medical Director)

Click on the different category headings to find out more. You can also change some of your preferences. Note that blocking some types of cookies may impact your experience on our websites and the services we are able to offer.

Jankov MR, Panagopoulou SI, Tsiklis NS, Hajitanasis GC, Aslanides M, Pallikaris G (2006) Topography-guided treatment of irregular astigmatism with the wavelight excimer laser. J Refract Surg 22:335–344

Tuan KM, Chernyak D, Fedman ST (2006) Predicting patients’ night vision complaints with wavefront technology. Arch Ophth 141:1–6

Vinciguerra P, Munoz MI, Camesasca FI(2002) Reduction of spherical aberration: experimental model of photoablation. J Refract Surg 18(3 Suppl):S366–S370

Katsanevaki, V.J., Albarrán, C., Piñero, D., Alió, J.L., Talamo, J.H., Alió, J.L. (2008). Optical Aberrations. In: Alió, J.L., Azar, D.T. (eds) Management of Complications in Refractive Surgery. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-37584-5_7

Boxer Wachler BS, Huynh VN, El Shiaty AF et al (2002) Evaluation of corneal functional optical zone after laser in situ keratomileusis. J Cataract Refract Surg 28:948–953

Smith EM, Talamo JH (1995) Evaluation of ocular cyclotorsion using a Maddox double-rod technique. J Cataract Refract Surg 21:402–403

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Holladay JT, Dudeja DR, Chang J (1999) Functional vision and corneal changes after laser in situ keratomileusis determined by contrast sensitivity, glare testing and corneal topography. J Cataract Refract Surg. 25:663–669

Reinstein DZ, Neal DR, Vogelsang H, Schroeder E, Nagy ZZ, Bergt M, Copland J, Topa D (2004) Optimized and wavefront guided corneal refractive surgery using the Carl Zeiss Meditec platform: the WASCA aberrometer, CRS-Master, and MEL80 excimer laser. Ophthalmol Clin North Am 17:191–210

Holladay JT, Janes JA (2002) Topographic changes in corneal asphericity and effective optical zone size after laser in situ keratomileusis. J Cataract Refract Surg 28:942–7

Bueeler M, Mrochen M, Seiler T (2003) Maximum permissible lateral decentration in aberration sensing and wavefront guided corneal ablation. J Cataract Refract Surg 29:257–263

Lin DY, Manche EE (2004) Custom-contoured ablation pattern method for the treatment od decentered laser ablations. J Cataract Refract Surg 30:1675–1684

Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, University of Illinois at Chicago, 3.138 EEI MC 648, 1855 W. Taylor Street, Chicago, IL, 60612, USA

Hiatt AJ, Grant CN, Boxer Waxler BS (2005) Establishing analysis parameters for spherical aberration after Wavefront LASIK. Ophthalmology 112:998–1002

Chromatic aberration

Yoon G, Macrae S, Williams DR, Cox IG (2005) Causes of spherical aberration induced by laser refractive surgery. J Cataract Refract Surg 31:127–135

Caliz A, Montes-Mico R, Belda JI, Alió JL (2004) Corneal aberrometry as a guide for the correction of irregular astigmatism. In: Treating irregular astigmatism and the keratoconus. Highlights of Ophthalmology International, El Dorado, Republic of Panama

O’ Bart DP, Lohmann CP, Fitzkke FW et al (1994) Discrimination between the origins and functional implications of haze and halo at night after photorefractive keratectomy. J Refract Corneal Surg 10(Suppl):S281

Miguel Hernández University, Medical School, Vissum Corporation, Avda de Denia s/n Edificio Vissum, 03016, Alicante, Spain

Alkara N, Genth U, Seiler T (1999) Diametral ablation: a technique to manage decentered photorefractive keratectomy for myopia. J Refract Surg 15:436–440

Alió JL, Belda JI (2004) Practical Guidelines for the correction of irregular astigmatism and keratoconus. In: Alió JL, Belda JI, Patel S (eds) Treating irregular astigmatism and keratoconus, Highlights of Ophthalmology International, Miami 2004, pp 335, 342

Opticallens

Opticalaberration

Kymionis GD, Panagopoulou SI, Aslanides IM, Plainis S, Astyrakakis N, Pallikaris IG (2004) Topographically supported customized ablation for the management of decentered laser in situ keratomileusis Am J Ophthalmol 137:806–811

Boyd BF, Agarwal A, Alió JL, Krueger RR, Wilson SE (2003) Wavefront analysis, aberrometers and corneal topography. Highlights of Ophthalmology International, El Dorado, Republic of Panama

Compare Sensor Sizes is a free, open source tool to easily compare multiple digital camera sensor sizes, celluloid film formats and lens image circles – ...

El-Danasoury A, Bains HS (2005) Optimized prolate corneal ablation: case report of the first treated eye. J Refract Surg 21(5 Suppl): S598–S602

Kanjani N, Jacob S, Agarwal A, Agarwal A, Agarwal S, Agarwal T, Doshi A, Doshi S (2004) Wavefrontand topography-guided ablation in myopic eyes using Zyoptix. J Cataract Refract Surg 30:398–402

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Gartry DS, Kerr Muir MG, Marshall J (1991) Photorefractive keratectomy with an argon fluoride excimer laser: a clinical study. J Refract Corneal Surg 7:420–435

Llorente L, Barbero S, Merayo J, Marcos S (2004) Total and corneal optical aberrations induced by laser in situ keratomileusis for hyperopia. J Refract Surg 20:203–216

202422 — The focal length of a lens is the optical distance from the point where the light meets inside the lens to the camera's sensor.

Knorz MC, Jendritza B (2000) Topographically guided laser in situ keratomileusis to treat corneal irregularities. Ophthalmology 107:1138–1143

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Azar DT, Yeh, PC (1997) Corneal topographic evaluation of decentration in photorefractive keratectomy: treatment displacement vs intraoperative drift. Am J Ophthalmol 124:312–320

Alio JL, Galal A, Montalban R, Piñero D (2006) Corneal wavefront guided LASIK retreatments for correction of highly aberrated corneas following refractive surgery. J Refract Surg (in press)

Alessio G, Boscia F, La Tegola MG, Sborgia C (2001) Corneal interactive programmed topographic ablation customized photorefractive keratectomy for correction of postkeratoplasty astigmatism. Ophthalmology 108:2029–2037

Manns F, Ho A, Parel JM, Culbertson W (2002) Ablation profiles for wavefront-guided correction of myopia and primary spherical aberration. J Cataract Refract Surg 28:766–74

Delivering Comprehensive Machine Vision Solutions. Transform your productivity with automated inspection systems.

Albarran-Diego C, Munoz G, Montes-Mico R, Rodriguez A, Alio JL (2006) Corneal aberration changes alter hyperopic LASIK: a comparison between the VISX Star S2 and the Asclepion-Meditec MEL 70 G Scan excimer lasers. J Refract Surg 2:34–42

There are different methods to measure the surface accuracy of an asphere which can be divided by contact measurements with probes and non contact measurements using interferometers and accessories.

Alió JL, Belda JI, Patel S (2004) Treating irregular astigmatism and keratoconus. Highlights of Ophthalmology International, Miami 2004, pp 1–14

Spherical lenses are easy to manufacture, but it has been identified by early opticians that using these lenses comes with aberrations on the image, called spherical aberrations. To compensate these aberration one can use doublets or complex systems of lens but this is costly and will take more space and weight.

Mantry S, Yeung I, Shah S (2004) Aspheric ablation with the Nidek EC-5000 CXII with OPD-Scan objective analysis. J Refract Surg 20(5 Suppl):S666–S668

Refractive Department Vardinoyannion Eye Institute, University of Crete Medical School, Voutes P.O. Box 1352, Heraklion, Crete, Greece

Tamayo GE, Serrano MG (2000) Early clinical experience using custom excimer laser ablations to treat irregular astigmatism. J Cataract Refract Surg 26:1442–1450

Optical aberrationsof the eye

Melles GRJ, Lander F, Rietveld FJR et al (1999) A new surgical technique for deep stromal, anterior lamellar keratoplasty. Br J Ophthalmol 83:327–333

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Department of Ophthalmology Miguel Hernández University, Medical School, Vissum Corporation, Avda de Denia s/n Edificio Vissum, 03016, Alicante, Spain

The other solution to remove the spherical aberration is to design the shape of the lens to avoid it, these complex shapes are defined by conical equation and are defined as aspherical shapes. Manufacturing of aspheres is more complex, but with recent (last 20 years) digitalisation of the production and testing equipment it becomes easier and cheaper.

Knorz MC, Neuhann T (2000) Treatment of myopia and myopic astigmatism by customized laser in situ keratomileusis based on corneal topography. Ophthalmology 107:2072–2076

Alio JL, Artola A, Rodriguez-Mier FA (2000) Selective zonal ablation with excimer laser for the correction of the irregular astigmatism induced by refractive surgery. Ophthalmology 107:662–673

Alió JL, Uhah J, Barraquer C, Bilgihan K, Anwar M, Melles GRJ (2002) New techniques in Lamellar keratoplasty. Curr Opin Ophthalmol 13:224–229

Types of aberration in optics

Gatinel D, Malet J, Hoang-Xuan T, Azar DT (2004) Corneal asphericity change after excimer laser hyperopic surgery: theoretical effects on corneal profiles and corresponding Zernike expansions. Invest Ophthalmol Vis Sci 45:1349–1359

Mrochen M, Krueger RR, Bueeler M, Seiler T (2002) Aberration sensing and wavefront guided laser in situ keratomileusis: management of decentered ablation. J Refract Surg 18:418–429

The difference between both lenses comes from their shape, while a spherical lens shape can be defined from a virtual center and a fix radius of curvature, an aspherical lens shape is defined from a virtual center point point but with different values of radius of curvature according to their relative angle.

Thompson V, Durrie DS, Cavanaugh TB (1993) Philosophy and technique for excimer laser phototherapeutic keratectomy. J Refract Corneal Surg 9:81–85

Sarkisian KA, Petrov AA (2002) Clinical experience with the customized low spherical aberration ablation profile for myopia. J Refract Surg 18(3 Suppl):S352–S356

Yeung IY, Mantry S, Cunliffe IA, Benson MT, Shah S (2004) Higher order aberrations with aspheric ablations using the Nidek EC-5000 CXII laser. J Refract Surg 20(5 Suppl):S659–S662

Caliz A, Montes-Mico R, Belda JI, Alió JL (2004) Corneal aberrometry as a guide for the correction of Irregular astigmatism. In: Alio JL, Belda JI (eds) Treating irregular astigmatism and keratoconus. Highlights of Ophthalmology International, El Dorado, Republic of Panama, pp 121–133

Uozato H, Guyton DL, Waring GO (1992) Centering corneal surgical procedures. In: Waring GO (ed) Refractive keratotomy for myopia and astigmatism. Mosby-Year Book, St. Louis, pp 491–505

Yamane N, Miyata K, Samejima T et al (1004) Ocular high order aberrations and contrast sensitivity after conventional laser in situ keratomileusis. Invest Ophthalmol Vis Sci 45:3986–3989

Seidelaberrations

An aspherical lens can be defined as a non spherical lens with at least a one optical face that can be defined following below conical equation.

Talamo JH, Wagoner MD, Lee SY (1995) Management of ablation decentration following excimer photorefractive keratectomy. Arch Ophthalmol 113:706–707

Harvard Medical School, Talamo Laser Eye Consultants, Reservoir Place, Suite 184 1601 Trapelo Rd., Waltham, MA, 02451, USA

Alessio G, Boscia F, La Tegola MG, Sborgia C (2001) Topography-driven excimer laser for the retreatment of decentralized myopic photorefractive keratectomy. Ophthalmology 108:1695–1703

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Gatinel D, Malet J, Hoang-Xuan T, Azar DT (2002) Analysis of customized corneal ablations: theoretical limitations of increasing negative asphericity. Invest Ophthalmol Vis Sci 43:941–948

Etymology 1. edit. From Old Norse lítt, a short form of lítit, the neuter of the adjective lítill (little) (Danish liden, lille).

Mrochen M, Kaemmerer M, Mierdel P et al (2001) Increased higher order aberrations after laser refractive surgery: a problem of subclinical decentration. J Cataract Refract Surg 27:362–369

Artola A, Alió JL, Bellot JL, Ruiz JM (1993) Protective properties of viscoelastic substances (sodium hyaluronate and 2% hydroxymethyl cellulose) against experimental free radical damage to the corneal endothelium. Cornea 12:109–114

Alió JL, Artola A, Rodríguez-Mier FA (2000) Selective zonal ablations with excimer laser for correction of irregular astigmatism induced by refractive surgery. Ophthalmology 107:662–673

Alió JL, Belda JI, Artola A, García-Lledó M, Osman A (2002) Contact lens fitting in the correction of irregular astigmatism after corneal refractive surgery. J Cataract Refract Surg 28:1750–1757

Porter J, Yoon G, Lozano D et al (2006) Aberrations induced in wavefront-guided laser refractive surgery due to shifts between natural and dilated pupil center locations. J Cataract Refract Surg 32:21–32

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Berny F (1968) Formation des images retienes: Determination de l’aberration spherique due system de l’œil. Ph.D. thesis, University of Paris

Knorz MC, Jendiritza B (2000) Topography guided laser in situ keratomileusis to treat corneal irregularities. Ophthalmology 107:1138–1143

Miguel Hernandez University, Medical School, Vissum Corporation, Avda de Denia s/n Edificio Vissum, 03016, Alicante, Spain

Pallikaris IG, Katsanevaki VJ (2000) Management of eccentric ablations. In: McRae SM, Krueger RR, Applegate RA (eds) Customized corneal ablation: the quest for supervision. Slack, Thorofare, N.J., pp 293–298

Vinciguerra P, Camesasca FI, Calossi A (2003) Statistical analysis of physiological aberrations of the cornea. J Refract Surg 19(Suppl): S265–S269

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