title: Topography-guided vertical implantation of Intacs using a femtosecond laser for the treatment of keratoconus.
abstract: We report 2 cases of vertical implantation of Intacs (Addition Technology) for the correction of keratoconus with temporal cones. Case 1 was a 16-year-old boy. In the left eye, the refraction was -4.50 x 100, with an uncorrected visual acuity (UCVA) of 0.5 and a best corrected visual acuity (BCVA) of 0.7. The flattest meridian (K1) was 43.7@100 and the steepest meridian (K2), 46.9@10. Case 2 was a 20-year-old woman. In the left eye, the refraction was -6.00 -7.00 x 100, with a UCVA of 0.05 and a BCVA of 0.1; K1 was 51.3@25 and K2, 55.1@115. In each patient, 2 Intacs segments of 0.45 mm and 0.25 mm were inserted in the temporal and nasal regions, respectively. One year postoperatively, the UCVA was 0.7 and 0.3 in Case 1 and Case 2, respectively, and the BCVA was 0.8 and 0.5, respectively. The postoperative refraction was -2.50 x 110 in Case 1 and -5.25 x 95 in Case 2. Based on the localization of the cone, Intacs implantation appeared to improve visual acuity in keratoconic patients.
authors.affiliation: Kudret Eye Hospital, Ankara, Turkey.
authors.forename: Aylin
authors.initials: A
authors.lastname: Ertan
authors.forename: Mehmet
authors.initials: M
authors.lastname: Bahadir
mesh_terms: D000293:Adolescent; D000328:Adult; D003319:Corneal Stroma / Q000473:pathology / Q000601:surgery*; D019781:Corneal Topography / Q000379:methods*; D005260:Female; D006801:Humans; D007640:Keratoconus / Q000175:diagnosis / Q000601:surgery*; D053685:Laser Therapy / Q000379:methods; D008297:Male; D019904:Polymethyl Methacrylate; D019736:Prostheses and Implants; D019919:Prosthesis Implantation / Q000379:methods*; D014792:Visual Acuity
chemical_list: D019904:Polymethyl Methacrylate