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	1.	Longitudinal changes in visual acuity in keratoconus. [electronic resource] by Davis, Larry J Schechtman, Kenneth B Wilson, Brad S Rosenstiel, Carol E Riley, Colleen H Libassi, David P Gundel, Ralph E Rosenberg, Louis Gordon, Mae O Zadnik, Karla Producer: 20060227 In: Investigative ophthalmology & visual science vol. 47 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	Variables affecting rigid contact lens comfort in the collaborative longitudinal evaluation of keratoconus (CLEK) study. [electronic resource] by Edrington, Timothy B Gundel, Ralph E Libassi, David P Wagner, Heidi Pierce, Gilbert E Walline, Jeffrey J Barr, Joseph T Olafsson, Harald E Steger-May, Karen Achtenberg, Joel Wilson, Brad S Gordon, Mae O Zadnik, Karla Producer: 20040415 In: Optometry and vision science : official publication of the American Academy of Optometry vol. 81 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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