References
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2. Alpins NA: New method of targeting vectors to treat astigmatism. J Cataract Refract Surg 1997 Jan;23(1):65-75
3. Alpins NA: Vector analysis of astigmatism changes by flattening, steepening, and torque. J Cataract Refract Surg 1997 Dec;23(10):1503-1514
4. · Alpins, NA: The treatment of irregular astigmatism. J Cataract Refract Surg 1998 May;24(5); 634-646
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16. FaxPoll, Ocular Surgery News, July 15, 1995 issue, p 10
17. Seiler T, Reckmann W, Maloney RK: Effective spherical aberration of the cornea as a quantitative descriptor in corneal topography. Supplement to J Cataract Refract Surg 1993; 19:155-165.
18. Duke-Elder S, ed. System of Ophthalmology, Vol 5: Ophthalmic Optics and Refraction. St. Louis, Mosby, 1970; 275-278.
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