1. 1 . Barrort GJ Villasenor RA Weber M: Correction of induced astigmatism after cataract surgery with introduction of an intraocular lens. Ophthalmic Surg 1977; 8:110-112.
2. 2. Troutman RC Kelley S Kaye D et al: The use and preliminary results of the Troutman surgical keratometer in cataract and corneal surgery. Trans Am Acad Ophthalmol Otolaryngol 1977; 83:232-238.
3. 3. Terry CM: Introduction to a surgical keratometer in Emery JM Jacobson AC(eds): Current Concepts in Cataract Surgery. St Louis CV Mosby Co 1980 p 27-28.
4. 4. Jaffe NS dayman HM: The pathophysiology of corneal astigmatism after cataract extraction. Trans Am Acad Ophthalmol Otolaryngol 1975; 79:OP615-OP630.
5. 5. Meredith TA Maumenee AE: A review of one thousand cases of intracapsular cataract extraction. II. Visual results and astigmatic analysis. Ophthalmic Surg Dec 1979; 10:42-45.