Contact Lens Spectrum

December 2007

Document #145




(p. 16) Prescribing for Astigmatism: Astigmatism Correction Means Great Visual Acuity, By John Mark Jackson, OD, MS, FAAO


Richdale K, Berntsen DA, Mack CJ, Merchea MM, Barr JT. Visual acuity with spherical and toric soft contact lenses in low- to moderate-astigmatic eyes. Optometry and Vision Science 2007; 84: 969-975.


Morgan PB, Efron SE, Efron N, Hill EA. Inefficacy of aspheric soft contact lenses for the correction of low levels of astigmatism. Optometry and Vision Science 2005; 82: 823-828.




(p. 18) Contact Lens Materials: A Silicone Hydrogel Material Gets an Upgrade, By Lyndon Jones, PhD, FCOptom, FAAO, & Kathy Dumbleton, MSc, MCOptom, FAAO


1.         Bambury R, Seelye D. Vinyl carbonate and vinyl carbamate contact lens materials. 1997;  US Patent # 5,610,252.

2.         Lopez-Alemany A, Compan V, Refojo MF: Porous structure of Purevision versus Focus Night & Day and conventional hydrogel contact lenses. J Biomed Mater Res (Appl Biomat) 2002; 63; 319 - 325.

3.         Kunzler J: Silicone-based hydrogels for contact lens applications. Contact Lens Spectrum 1999; 14;8 (supp): 9 - 11.

4.         Grobe G, Kunzler J, Seelye D, Salamone J: Silicone hydrogels for contact lens applications. Polymeric Materials Science and Engineering 1999; 80; 108 - 109.

5.         Maldonado-Codina C, Morgan PB: In vitro water wettability of silicone hydrogel contact lenses determined using the sessile drop and captive bubble techniques. J Biomed Mater Res A 2007; 83;2: 496-502.

6.         Nicolson PC, Vogt J: Soft contact lens polymers: an evolution. Biomaterials 2001; 22;24: 3273-83.

7.         Nicolson PC: Continuous wear contact lens surface chemistry and wearability. Eye Contact Lens 2003; 29;1 Suppl: S30-2; discussion S57-9, S192-4.

8.         Tighe B: Silicone hydrogels: Structure, properties and behaviour. in Silicone Hydrogels: Continuous Wear Contact Lenses, D. Sweeney, Editor. Oxford, Butterworth-Heinemann,2004, pp  1 - 27.

9.         Valint PL, Jr., Grobe GL, 3rd, Ammon DM, Jr., Moorehead M. Plasma surface treatment of silicone hydrogel contact lenses. 2001;  US Patent # 6,193,369.

10.       Gonzalez-Meijome JM, Lopez-Alemany A, Almeida JB, Parafita MA, Refojo MF: Microscopic observation of unworn siloxane-hydrogel soft contact lenses by atomic force microscopy. J Biomed Mater Res B Appl Biomater 2006; 76;2: 412-8.

11.       Jones L, Subbaraman LN, Rogers R, Dumbleton K: Surface treatment, wetting and modulus of silicone hydrogels. Optician 2006; 232;6067: 28 - 34.

12.       Dumbleton K: Adverse events with silicone hydrogel continuous wear. Contact Lens & Ant Eye 2002; 25; 137 - 146.

13.       Dumbleton K: Noninflammatory silicone hydrogel contact lens complications. Eye Contact Lens 2003; 29;1 Suppl: S186-9; discussion S190-1, S192-4.

14.       Jones L, Dumbleton K: Soft lens extended wear and complications. in Manual of Contact Lens Prescribing and Fitting, M.M. Hom and A. Bruce, Editors. Oxford, Butterworth-Heinemann,2006, pp  393 - 441.

15.       Dumbleton KA, Chalmers RL, McNally J, Bayer S, Fonn D: Effect of lens base curve on subjective comfort and assessment of fit with silicone hydrogel continuous wear contact lenses. Optom Vis Sci 2002; 79;10: 633 - 637.

16.       Reindel W, Cairns G, Bateman K: Visual outcomes associated with aspheric and non-aspheric silicone hydrogel lenses. BCLA Conference Poster 2007.

17.       Nilsson SE: Seven-day extended wear and 30-day continuous wear of high oxygen transmissibility soft silicone hydrogel contact lenses: a randomized 1-year study of 504 patients. CLAO J 2001; 27;3: 125-136.

18.       Brennan NA, Coles ML, Comstock TL, Levy B: A 1-year prospective clinical trial of balafilcon a (PureVision) silicone-hydrogel contact lenses used on a 30-day continuous wear schedule. Ophthalmology 2002; 109;6: 1172-7.

19.       Morgan PB, Efron N: Comparative clinical performance of two silicone hydrogel contact lenses for continuous wear. Clin Exp Optom 2002; 85;3: 183-92.

20.       Lim L, Tan DT, Chan WK: Therapeutic use of Bausch & Lomb PureVision contact lenses. CLAO J 2001; 27;4: 179-85.

21.       Foulks GN, Harvey T, Raj CV: Therapeutic contact lenses: the role of high-Dk lenses. Ophthalmol Clin North Am 2003; 16;3: 455-61.

22.       Arora R, Jain S, Monga S, Narayanan R, Raina UK, Mehta DK: Efficacy of continuous wear PureVision contact lenses for therapeutic use. Cont Lens Anterior Eye 2004; 27;1: 39-43.



(p. 21) Contact Lens Care: Cleaning and Disinfecting Hybrid Contact Lenses, by Susan J. Gromacki, OD, MS, FAAO


1.         Pilskalns B, Fink BA, and Hill RM.  Oxygen demands with hybrid contact lenses.  Optom Vis Sci 2007;84:334-341.


2.         Thompson TTT.  Tyler’s Quarterly.  September 2007:58.


3.         Kaseburg, Kellie.  Personal communication.  September 24, 2007.




(p. 31) Correcting Aberrations with Contact Lenses, By Pete S. Kollbaum, OD, PhD, FAAO, & Arthur S. Bradley, PhD


1.       Almeida, J. B. and A. M. Garcia (2005). "Theoretical calculation of a contact lens thickness designed to correct the eye's monochromatic aberrations." Optom Vis Sci 82(1): 59-63.

2.       Artal, P., L. Chen, et al. (2003). "Adaptive optics for vision: the eye's adaptation to point spread function." J Refract Surg 19(5): S585-7.

3.       Castejon-Mochon, J. F., N. Lopez-Gil, et al. (2002). "Ocular wave-front aberration statistics in a normal young population." Vision Res 42(13): 1611-7.

4.       Cheng, X., N. L. Himebaugh, et al. (2003). "Validation of a clinical Shack-Hartmann aberrometer." Optom Vis Sci 80(8): 587-95.

5.       Cheng, X., N. L. Himebaugh, et al. (2004). "Test-retest reliability of clinical Shack-Hartmann measurements." Invest Ophthalmol Vis Sci 45(1): 351-60.

6.       de Brabander, J., N. Chateau, et al. (2003). "Simulated optical performance of custom wavefront soft contact lenses for keratoconus." Optom Vis Sci 80(9): 637-43.

7.       Dietze, H. H. and M. J. Cox (2003). "On- and off-eye spherical aberration of soft contact lenses and consequent changes of effective lens power." Optom Vis Sci 80(2): 126-34.

8.       Dietze, H. H. and M. J. Cox (2004). "Correcting ocular spherical aberration with soft contact lenses." J Opt Soc Am A Opt Image Sci Vis 21(4): 473-85.

9.       Guirao, A., J. Porter, et al. (2002). "Calculated impact of higher-order monochromatic aberrations on retinal image quality in a population of human eyes." J Opt Soc Am A Opt Image Sci Vis 19(1): 1-9.

10.   Guirao, A., D. R. Williams, et al. (2001). "Effect of rotation and translation on the expected benefit of an ideal method to correct the eye's higher-order aberrations." J Opt Soc Am A Opt Image Sci Vis 18(5): 1003-15.

11.   Ho, A. (2003). "Aberration correction with soft contact lens: is the postlens tear film important?" Eye Contact Lens 29(1 Suppl): S182-5; discussion S190-1, S192-4.

12.   Holden, B. A., J. A. Siddle, et al. (1976). "Soft lens performance models: The clinical significance of the lens flexure effect." Aust J Optom 59(117): 117-129.

13.   Jeong, T. M., M. Menon, et al. (2005). "Measurement of wave-front aberration in soft contact lenses by use of a Shack-Hartmann wave-front sensor." Appl Opt 44(21): 4523-7.

14.   Kollbaum, P. and A. Bradley (2005). "Aspheric contact lenses: fact and fiction." Contact Lens Spectrum(March).

15.   Lopez-Gil, N., J. F. Castejon-Mochon, et al. (2002). "Aberration generation by contact lenses with aspheric and asymmetric surfaces." J Refract Surg 18(5): S603-9.

16.   Pantanelli, S., S. Macrae, et al. (2007). "Characterizing the Wave Aberration in Eyes with Keratoconus or Penetrating Keratoplasty Using a High-Dynamic Range Wavefront Sensor." Ophthalmology.

17.   Porter, J., A. Guirao, et al. (2001). "Monochromatic aberrations of the human eye in a large population." J Opt Soc Am A Opt Image Sci Vis 18(8): 1793-803.

18.   Sabesan, R., T. M. Jeong, et al. (2007). "Vision improvement by correcting higher-order aberrations with customized soft contact lenses in keratoconic eyes." Opt Lett 32(8): 1000-2.

19.   Sarver, M. D. (1974). "Supplemental power effect of Bausch and Lomb Soflens contact lenses." ICLC 1: 101-9.

20.   Smirnov, M. S. (1962). "Measurement of the wave aberration of the human eye." Biophysics 7: 766-95.

21.   Thibos, L. N. (2000). "Principles of Hartmann-Shack aberrometry." J Refract Surg 16(5): S563-5.

22.   Thibos, L. N., A. Bradley, et al. (2002). "A statistical model of the aberration structure of normal, well-corrected eyes." Ophthalmic Physiol Opt 22(5): 427-33.

23.   Thibos, L. N., X. Cheng, et al. (2003). "Design principles and limitations of wave-front guided contact lenses." Eye Contact Lens 29(1 Suppl): S167-70; discussion S190-1, S192-4.

24.   Thibos, L. N., X. Hong, et al. (2002). "Statistical variation of aberration structure and image quality in a normal population of healthy eyes." J Opt Soc Am A Opt Image Sci Vis 19(12): 2329-48.

25.   Tomlinson, A., W. H. Ridder, 3rd, et al. (1994). "Blink-induced variations in visual performance with toric soft contact lenses." Optom Vis Sci 71(9): 545-9.

26.   Williams, D., G. Y. Yoon, et al. (2000). "Visual benefit of correcting higher order aberrations of the eye." J Refract Surg 16(5): S554-9.

27.   Yoon, G. Y. (2002). "Visual performance after correcting the monochromatic and chromatic aberrations of the eye." J Opt Soc Am A 19(2): 266-75.



(p. 40) Comparing Lens Care Systems for Silicone Hydrogel Contact Lenses, by Chris Amos, MSc, BSc.


[1] Dillehay SM, McCarter HE, et al. A comparison of multi-purpose care systems. Contact Lens Spectrum 2002; April 30-36

[1] Morgan et al.  International Contact Lens Prescribing in 2006. Contact Lens Spectrum Jan 2007

[1] Andrasko GJ, Kelly MS, Ryan,A, Garfolo Rj, Lemp, JM.  Ocular response observed with silicone hydrogel and multi-purpose solution combinations; AAO, 2006. Updated on

[1] Young G, Veys J, Pritchard N, et al.  A multi-centre study of lapsed CL wearers.  Ophthalmic Physiolol Opt 2002;22:516-27

[1] Lebow K.  Choosing contact lens care solutions:a scientific approach.  Review of contact lenses June 2004 24-27

[1] Dumbleton K.  Clinical performance of a hydrogen peroxide lens care regimen with silicone hydrogel lenses.  Poster 060069 AOA academy meeting Denver 2006

[1] Information Resources Inc consumer network

[1] Doughty MJ  Consideration of three types of spontaneous eyeblink activity in normal humans: during reading and video display terminal use, in primary gaze, and while in conversation.  Optom Vis Sci 2001;78:712-725

[1] Nichols J, Mitchell L, King-Smith P.  The impact of Contact Lens care Solutions on the thickness of the tear film and contact lens.  Cornea 2005; 24:825-831

[1] Information Resources Inc consumer network



(p. 48) Determining DLK After LASIK, By William L. Miller, OD, PhD, FAAO


Boorstein SM, Henk HJ, Elner VM Atopy: a patient-specific risk factor

for diffuse lamellar keratitis Ophthalmology. 2003 Jan;110(1):131-7.


Linebarger EJ, Hardten DR, Lindstrom RL. Diffuse lamellar keratitis:

diagnosis and management.J  Cataract Refract Surg. 2000





(p. 51) Readers’ Forum: Symptoms Occurring in a Cluster of Patients, By Farid Eghbali, OD, FAAO; Quang Chung, OD; & Cynthia Arata, OD


1.  Crook TG, Freeman JJ.  Reactions induced by the concurrent use of thimerosal and tetracycline.  Am J Optom Physiol Opt. 1983 Sep;60(9):759-61.


2.  Rakow PL.  Current contact lens care systems.  Ophthalmol Clin North Am. 2003 Sep;16(3):415-32.


3.  Jones L, MacDougall N, Sorbara LG.  Asymptomatic corneal staining associated with the use of balafilcon silicone-hydrogel contact lenses disinfected with a polyaminopropyl biguanide-preserved care regimen.  Optom Vis Sci. 2002 Dec;79(12):753-61.


4.  Lebow KA, Schachet JL.  Evaluation of corneal staining and patient preference with use of three multi-purpose solutions and two brands of soft contact lenses.   Eye Contact Lens. 2003 Oct;29(4):213-20.


5:  Khor WB, Aung T, Saw SM, et al. An outbreak of Fusarium keratitis associated with contact lens wear in Singapore.  JAMA. 2006 Jun 28;295(24):2867-73




(p. 56) Contact Lens Case Reports: Viewing Corneal Thinning in Keratoconus, By Patrick J. Caroline, FAAO, & Mark P. André